build(deps): bump mysql2 from 3.6.1 to 3.9.4

Bumps [mysql2](https://github.com/sidorares/node-mysql2) from 3.6.1 to 3.9.4.
- [Release notes](https://github.com/sidorares/node-mysql2/releases)
- [Changelog](https://github.com/sidorares/node-mysql2/blob/master/Changelog.md)
- [Commits](sidorares/node-mysql2@v3.6.1...v3.9.4)

---
updated-dependencies:
- dependency-name: mysql2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package-lock.json

@@ -37,7 +37,7 @@
     "ioredis": "^5.3.2",
     "lodash": "^4.17.21",
     "moment": "^2.29.4",
-    "mysql2": "^3.6.1",
+    "mysql2": "^3.9.4",
     "reflect-metadata": "^0.1.13",
     "rxjs": "^7.8.1",
     "svg-captcha": "^1.4.0",