Update dependency express to v4.20.0 [SECURITY]

Author: renovate[bot]

package.json

@@ -12,7 +12,7 @@
     "canvas-constructor": "5.0.2",
     "cookie-parser": "1.4.6",
     "discord.js": "13.17.1",
-    "express": "4.19.2",
+    "express": "4.20.0",
     "express-session": "1.18.0",
     "fs-nextra": "0.5.1",
     "is-html": "3.1.0",