Bump mysql2 from 3.6.0 to 3.9.7

Bumps [mysql2](https://github.com/sidorares/node-mysql2) from 3.6.0 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@v3.6.0...v3.9.7)

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

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

package.json

@@ -35,7 +35,7 @@
     "class-validator": "^0.14.0",
     "dotenv": "^16.3.1",
     "graphql": "^16.8.1",
-    "mysql2": "^3.6.0",
+    "mysql2": "^3.9.7",
     "reflect-metadata": "^0.1.13",
     "rxjs": "^7.8.1",
     "typeorm": "^0.3.17"