Bump com.mysql:mysql-connector-j from 8.3.0 to 8.4.0 (#6128)

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](https://github.com/mysql/mysql-connector-j/compare/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
...

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build.gradle

@@ -60,7 +60,7 @@ ext {
         "dm"                         : fileTree(dir: 'libs', includes: ["jdbcDriver-18.jar"]),
         "kingbase"                   : fileTree(dir: 'libs', includes: ["kingbase8-8.2.0.jar"]),
         "h2"                         : "com.h2database:h2:2.2.224",
-        "mysql"                      : "com.mysql:mysql-connector-j:8.3.0",
+        "mysql"                      : "com.mysql:mysql-connector-j:8.4.0",
         "sqlite"                     : "org.xerial:sqlite-jdbc:3.45.3.0",
         "firebird"                   : "org.firebirdsql.jdbc:jaybird:5.0.4.java8",
         //cache