refactor(request): rewrite has_param method to one-liner (#2489)

Refactor the request.has_params(str) method to improve readability

Closes #2488

Author: Bombaclath97

falcon/request.py

@@ -2349,10 +2349,7 @@ def has_param(self, name: str) -> bool:
 
         """
 
-        if name in self._params:
-            return True
-        else:
-            return False
+        return name in self._params
 
     def log_error(self, message: str) -> None:
         """Write an error message to the server's log.