fix: update mysql2 dependency to version 3.9.4

Author: mayank-kushwah-ev

package.json

@@ -61,7 +61,7 @@
     "cors": "^2.8.5",
     "express": "^4.18.2",
     "jsonwebtoken": "^9.0.0",
-    "mysql2": "^2.3.3",
+    "mysql2": "^3.9.4",
     "sequelize": "^6.32.1"
   },
   "devDependencies": {