Bump mysql/community-server from 9.3.0 to 9.4.0 in /tooling/docker

Bumps mysql/community-server from 9.3.0 to 9.4.0.

---
updated-dependencies:
- dependency-name: mysql/community-server
  dependency-version: 9.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

tooling/docker/mysql.Dockerfile

@@ -1,3 +1,3 @@
 # MySQL
 # See https://hub.docker.com/_/mysql
-FROM container-registry.oracle.com/mysql/community-server:9.3.0
+FROM container-registry.oracle.com/mysql/community-server:9.4.0