fix comment

Author: Prachi Gandhi

assets/evaluation_on_cloud/environments/evaluations-built-in/context/model_target.py

@@ -15,7 +15,7 @@
 
 
 def get_key_from_dict(d, key, default=None):
-    """Get a particular Key from given dict"""
+    """Get a particular Key from given dict."""
     for k, v in d.items():
         if k.lower() == key.lower():
             return v