Bump mysql2 from 3.9.4 to 3.9.7 (#417)

Bumps [mysql2](https://github.com/sidorares/node-mysql2) from 3.9.4 to 3.9.7.
- [Release notes](https://github.com/sidorares/node-mysql2/releases)
- [Changelog](https://github.com/sidorares/node-mysql2/blob/master/Changelog.md)
- [Commits](sidorares/node-mysql2@v3.9.4...v3.9.7)

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

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package.json

@@ -85,7 +85,7 @@
     "koa-bodyparser": "^4.3.0",
     "mongodb": "^4.17.1",
     "mysql": "^2.18.1",
-    "mysql2": "^3.9.4",
+    "mysql2": "^3.9.7",
     "next": "^13.5.4",
     "npm-run-all": "^4.1.5",
     "nuxt": "^3.8.2",