Bump com.mysql:mysql-connector-j in the testcontainers group

Bumps the testcontainers group with 1 update: [com.mysql:mysql-connector-j](https://github.com/mysql/mysql-connector-j).


Updates `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
  dependency-group: testcontainers
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -17,7 +17,7 @@ vertxWebClientVersion = "5.0.1"
 com-fasterxml-jackson-core-jackson-databind = { group = "com.fasterxml.jackson.core", name = "jackson-databind", version.ref = "jacksonDatabindVersion" }
 com-ibm-db2-jcc = { group = "com.ibm.db2", name = "jcc", version = "12.1.2.0" }
 com-microsoft-sqlserver-mssql-jdbc = { group = "com.microsoft.sqlserver", name = "mssql-jdbc", version = "13.1.1.jre11-preview" }
-com-mysql-mysql-connector-j = { group = "com.mysql", name = "mysql-connector-j", version = "9.3.0" }
+com-mysql-mysql-connector-j = { group = "com.mysql", name = "mysql-connector-j", version = "9.4.0" }
 com-ongres-scram-scram-client = { group = "com.ongres.scram", name = "scram-client", version = "3.1" }
 io-smallrye-reactive-mutiny = { group = "io.smallrye.reactive", name = "mutiny", version = "2.9.4" }
 io-vertx-vertx-db2-client = { group = "io.vertx", name = "vertx-db2-client", version.ref = "vertxSqlClientVersion" }