Update dependency dotenv to v16.4.6

Author: renovate[bot]

package-lock.json

@@ -15,7 +15,7 @@
     "cookie-parser": "1.4.6",
     "csurf": "1.11.0",
     "debug": "4.3.4",
-    "dotenv": "16.0.2",
+    "dotenv": "16.4.6",
     "express": "4.18.1",
     "express-mysql-session": "2.1.8",
     "express-session": "1.17.3",