Update config.py

I feel pretty confident that this was supposed to be strip()

modules/config.py

@@ -142,7 +142,7 @@ class ConfigFile:
         if "metadata_files" in attrs and attrs["metadata_files"]:
             self.requested_metadata_files = []
             for s in attrs["metadata_files"].split("|"):
-                s = s.stripe()
+                s = s.strip()
                 if s:
                     if s.endswith(".yml"):
                         self.requested_metadata_files.append(s[:-4])