Bump com.mysql:mysql-connector-j from 9.3.0 to 9.4.0

Bumps [com.mysql:mysql-connector-j](https://github.com/mysql/mysql-connector-j) from 9.3.0 to 9.4.0.
- [Changelog](https://github.com/mysql/mysql-connector-j/blob/release/9.x/CHANGES)
- [Commits](mysql/mysql-connector-j@9.3.0...9.4.0)

---
updated-dependencies:
- dependency-name: com.mysql:mysql-connector-j
  dependency-version: 9.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

build.gradle.kts

@@ -24,7 +24,7 @@ val kotlinxCoroutinesVersion = "1.10.2"
 
 val exposedVersion = "0.61.0"
 val sqliteVersion = "3.50.3.0"
-val mySqlVersion = "9.3.0"
+val mySqlVersion = "9.4.0"
 val postgresSqlVersion = "42.7.7"
 val mariaDBVersion = "3.5.4"