Convert experiment not found log to a warning (#2)

Author: isugimpy

reddit_experiments/__init__.py

@@ -1,5 +1,6 @@
 import json
 import logging
+import warnings
 
 from enum import Enum
 from typing import Dict
@@ -132,7 +133,7 @@ def _get_experiment(self, name: str) -> Optional[Experiment]:
             self._cfg_data = self._get_config()
 
         if name not in self._cfg_data:
-            logger.info("Experiment <%r> not found in experiment config", name)
+            warnings.warn(f"Experiment <{repr(name)}> not found in experiment config")
             return None
 
         try: