Bump sc-transaction-pool from `7d233c2` to `7879b22`

Bumps [sc-transaction-pool](https://github.com/paritytech/substrate) from `7d233c2` to `7879b22`.
- [Release notes](https://github.com/paritytech/substrate/releases)
- [Upgrade guide](https://github.com/paritytech/substrate/blob/master/docs/Upgrade.md)
- [Commits](https://github.com/paritytech/substrate/compare/7d233c2446b5a60662400a0a4bcfb78bb3b79ff7...7879b22b7f81c562b268fd3f2ae8b56ac67799ec

)

---
updated-dependencies:
- dependency-name: sc-transaction-pool
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>