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>
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