Bump curve25519-dalek from 4.1.2 to 4.1.3 (#4824)

Bumps
[curve25519-dalek](https://github.com/dalek-cryptography/curve25519-dalek)
from 4.1.2 to 4.1.3.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dalek-cryptography/curve25519-dalek/commit/5312a0311ec40df95be953eacfa8a11b9a34bc54"><code>5312a03</code></a>
curve: Bump version to 4.1.3 (<a
href="https://redirect.github.com/dalek-cryptography/curve25519-dalek/issues/660">#660</a>)</li>
<li><a
href="https://github.com/dalek-cryptography/curve25519-dalek/commit/b4f9e4df92a4689fb59e312a21f940ba06ba7013"><code>b4f9e4d</code></a>
SECURITY: fix timing variability in backend/serial/u32/scalar.rs (<a
href="https://redirect.github.com/dalek-cryptography/curve25519-dalek/issues/661">#661</a>)</li>
<li><a
href="https://github.com/dalek-cryptography/curve25519-dalek/commit/415892acf1cdf9161bd6a4c99bc2f4cb8fae5e6a"><code>415892a</code></a>
SECURITY: fix timing variability in backend/serial/u64/scalar.rs (<a
href="https://redirect.github.com/dalek-cryptography/curve25519-dalek/issues/659">#659</a>)</li>
<li><a
href="https://github.com/dalek-cryptography/curve25519-dalek/commit/56bf398d0caed63ef1d1edfbd35eb5335132aba2"><code>56bf398</code></a>
Updates license field to valid SPDX format (<a
href="https://redirect.github.com/dalek-cryptography/curve25519-dalek/issues/647">#647</a>)</li>
<li><a
href="https://github.com/dalek-cryptography/curve25519-dalek/commit/9252fa5c0d09054fed4ac4d649e63c40fad7abaf"><code>9252fa5</code></a>
Mitigate check-cfg until MSRV 1.77 (<a
href="https://redirect.github.com/dalek-cryptography/curve25519-dalek/issues/652">#652</a>)</li>
<li><a
href="https://github.com/dalek-cryptography/curve25519-dalek/commit/1efe6a93b176c4389b78e81e52b2cf85d728aac6"><code>1efe6a9</code></a>
Fix a minor typo in signing.rs (<a
href="https://redirect.github.com/dalek-cryptography/curve25519-dalek/issues/649">#649</a>)</li>
<li><a
href="https://github.com/dalek-cryptography/curve25519-dalek/commit/cc3421a22fa7ee1f557cbe9243b450da53bbe962"><code>cc3421a</code></a>
Indicate that the rand_core feature is required (<a
href="https://redirect.github.com/dalek-cryptography/curve25519-dalek/issues/641">#641</a>)</li>
<li><a
href="https://github.com/dalek-cryptography/curve25519-dalek/commit/858c4ca8ae03d33fe8b71b4504c4d3f5ff5b45c0"><code>858c4ca</code></a>
Address new nightly clippy unnecessary qualifications (<a
href="https://redirect.github.com/dalek-cryptography/curve25519-dalek/issues/639">#639</a>)</li>
<li><a
href="https://github.com/dalek-cryptography/curve25519-dalek/commit/31ccb6705067d68782cb135e23c79b640a6a06ee"><code>31ccb67</code></a>
Remove platforms in favor using CARGO_CFG_TARGET_POINTER_WIDTH (<a
href="https://redirect.github.com/dalek-cryptography/curve25519-dalek/issues/636">#636</a>)</li>
<li><a
href="https://github.com/dalek-cryptography/curve25519-dalek/commit/19c7f4a5d5e577adc9cc65a837abef9ed7ebf0a4"><code>19c7f4a</code></a>
Fix new nightly redundant import lint warns (<a
href="https://redirect.github.com/dalek-cryptography/curve25519-dalek/issues/638">#638</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/dalek-cryptography/curve25519-dalek/compare/curve25519-4.1.2...curve25519-4.1.3">compare
view</a></li>
</ul>
</details>
<br />


[![Dependabot compatibility
score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=curve25519-dalek&package-manager=cargo&previous-version=4.1.2&new-version=4.1.3)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't
alter it yourself. You can also trigger a rebase manually by commenting
`@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits
that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after
your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge
and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating
it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all
of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop
Dependabot creating any more for this major version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop
Dependabot creating any more for this minor version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop
Dependabot creating any more for this dependency (unless you reopen the
PR or upgrade to it yourself)
You can disable automated security fix PRs for this repo from the
[Security Alerts
page](https://github.com/paritytech/polkadot-sdk/network/alerts

).

</details>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>