fixup, re-fix old bug in Python-related objtypes

Only add method to obj types if it's not there already.

Author: jakobandersen

sphinx/domains/python/__init__.py

@@ -831,7 +831,7 @@ def _intersphinx_adjust_object_types(self, env: BuildEnvironment,
                                          node: pending_xref, contnode: Element,
                                          objtypes: list[str]) -> None:
         # we adjust the object types for backwards compatibility
-        if 'attribute' in objtypes:
+        if 'attribute' in objtypes and 'method' not in objtypes:
             # Since Sphinx-2.1, properties are stored as py:method
             objtypes.append('method')