build(deps): update sqlx requirement

Updates the requirements on [sqlx](https://github.com/launchbadge/sqlx) to permit the latest version.

Updates `sqlx` to 0.8.0
- [Changelog](https://github.com/launchbadge/sqlx/blob/main/CHANGELOG.md)
- [Commits](launchbadge/sqlx@v0.7.3...v0.8.0)

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

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

askar-storage/Cargo.toml

@@ -59,7 +59,7 @@ version = "0.3"
 default-features = false
 features = ["chrono", "runtime-tokio"]
 optional = true
-version = "0.7.3"
+version = "0.8.0"
 
 [dev-dependencies]
 env_logger = "0.10"