[5.4] Upgrade NPM dev dependency mysql2 from ^2.3.3 to ^3.15.3 (joomla#46383)

Author: muhme

package-lock.json

@@ -109,7 +109,7 @@
     "jasmine-core": "^5.10.0",
     "joomla-cypress": "^1.3.1",
     "lightningcss": "^1.30.1",
-    "mysql2": "^2.3.3",
+    "mysql2": "^3.15.3",
     "pg": "^8.16.3",
     "postcss-scss": "^4.0.9",
     "recursive-readdir": "^2.2.3",