fix(deps): update dependency mysql2 to v3.15.3

Author: renovate[bot]

package.json

@@ -161,7 +161,7 @@
     "mongoose": "8.19.2",
     "mqtt": "5.14.1",
     "multer": "2.0.2",
-    "mysql2": "3.15.2",
+    "mysql2": "3.15.3",
     "nats": "2.29.3",
     "nodemon": "3.1.10",
     "nyc": "14.1.1",

sample/05-sql-typeorm/package.json

@@ -23,7 +23,7 @@
     "@nestjs/core": "11.1.6",
     "@nestjs/platform-express": "11.1.6",
     "@nestjs/typeorm": "11.0.0",
-    "mysql2": "3.15.2",
+    "mysql2": "3.15.3",
     "reflect-metadata": "0.2.2",
     "rimraf": "6.0.1",
     "rxjs": "7.8.2",

sample/07-sequelize/package.json

@@ -23,7 +23,7 @@
     "@nestjs/core": "11.1.6",
     "@nestjs/platform-express": "11.1.6",
     "@nestjs/sequelize": "11.0.1",
-    "mysql2": "3.15.2",
+    "mysql2": "3.15.3",
     "reflect-metadata": "0.2.2",
     "rimraf": "6.0.1",
     "rxjs": "7.8.2",