chore(deps): bump mongodb from 2.8.0 to 2.8.1 in /core (#4212)

Bumps [mongodb](https://github.com/mongodb/mongo-rust-driver) from 2.8.0 to 2.8.1.
- [Release notes](https://github.com/mongodb/mongo-rust-driver/releases)
- [Commits](mongodb/mongo-rust-driver@v2.8.0...v2.8.1)

---
updated-dependencies:
- dependency-name: mongodb
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

core/Cargo.toml

@@ -310,7 +310,7 @@ mini-moka = { version = "0.10", optional = true }
 # for services-moka
 moka = { version = "0.12", optional = true, features = ["future", "sync"] }
 # for services-mongodb
-mongodb = { version = "2.8.0", optional = true, features = ["tokio-runtime"] }
+mongodb = { version = "2.8.1", optional = true, features = ["tokio-runtime"] }
 # for services-mysql
 mysql_async = { version = "0.32.2", default-features = false, features = [
   "default-rustls",