Bump com.mysql:mysql-connector-j from 8.3.0 to 8.4.0

Bumps [com.mysql:mysql-connector-j](https://github.com/mysql/mysql-connector-j) from 8.3.0 to 8.4.0.
- [Changelog](https://github.com/mysql/mysql-connector-j/blob/release/8.x/CHANGES)
- [Commits](mysql/mysql-connector-j@8.3.0...8.4.0)

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

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

commafeed-server/pom.xml

@@ -419,7 +419,7 @@
 		<dependency>
 			<groupId>com.mysql</groupId>
 			<artifactId>mysql-connector-j</artifactId>
-			<version>8.3.0</version>
+			<version>8.4.0</version>
 		</dependency>
 		<dependency>
 			<groupId>org.mariadb.jdbc</groupId>