fix(deps): update dependency express-rate-limit to v8 (#323)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -22,7 +22,7 @@
     "discord-irc": "2.9.0",
     "domready": "1.0.8",
     "express": "5.2.1",
-    "express-rate-limit": "6.11.2",
+    "express-rate-limit": "8.5.2",
     "gitter-irc-bot": "1.6.0",
     "highlight.js": "11.11.1",
     "moment": "2.30.1",