fix: upgrade express-rate-limit from 5.1.3 to 5.2.6

Snyk has created this PR to upgrade express-rate-limit from 5.1.3 to 5.2.6.

See this package in npm:
https://www.npmjs.com/package/express-rate-limit

See this project in Snyk:
https://app.snyk.io/org/bitokenja3/project/62bbbe17-4588-47ca-9307-b2fe0dd2316a?utm_source=github&utm_medium=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -36,7 +36,7 @@
     "csurf": "^1.11.0",
     "dotenv": "^8.2.0",
     "express": "^4.17.1",
-    "express-rate-limit": "^5.1.3",
+    "express-rate-limit": "^5.2.6",
     "flat": "^5.0.0",
     "github-slugger": "^1.2.1",
     "got": "^9.6.0",