feat: Update route patterns to use path-to-regexp v8 syntax (#9942)

BREAKING CHANGE: Route pattern syntax across cloud routes and rate-limiting now use the new path-to-regexp v8 syntax; see the [migration guide](https://github.com/parse-community/parse-server/blob/alpha/9.0.0.md) for more details.

src/Options/Definitions.js

@@ -686,7 +686,7 @@ module.exports.RateLimitOptions = {
   requestPath: {
     env: 'PARSE_SERVER_RATE_LIMIT_REQUEST_PATH',
     help:
-      'The path of the API route to be rate limited. Route paths, in combination with a request method, define the endpoints at which requests can be made. Route paths can be strings, string patterns, or regular expression. See: https://expressjs.com/en/guide/routing.html',
+      'The path of the API route to be rate limited. Route paths, in combination with a request method, define the endpoints at which requests can be made. Route paths can be strings or string patterns following <a href="https://github.com/pillarjs/path-to-regexp">path-to-regexp v8</a> syntax.',
     required: true,
   },
   requestTimeWindow: {