Update dependency express to v4.20.0 [SECURITY]

Author: renovate[bot]

package.json

@@ -35,7 +35,7 @@
     "css-loader": "6.7.1",
     "csurf": "1.11.0",
     "dotenv": "10.0.0",
-    "express": "4.17.1",
+    "express": "4.20.0",
     "express-rate-limit": "5.3.0",
     "flat": "5.0.2",
     "github-slugger": "1.4.0",