chore(deps): bump sqlx from 0.7.4 to 0.8.1 in /fhevm-engine

Bumps [sqlx](https://github.com/launchbadge/sqlx) from 0.7.4 to 0.8.1.
- [Changelog](https://github.com/launchbadge/sqlx/blob/main/CHANGELOG.md)
- [Commits](launchbadge/sqlx@v0.7.4...v0.8.1)

---
updated-dependencies:
- dependency-name: sqlx
  dependency-type: direct:production
...

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