cp_lib_validators.py: fix conditional variable duplication

Author: sommersoft

adabot/lib/circuitpython_library_validators.py

@@ -226,7 +226,7 @@ def validate_repo_state(self, repo):
                 errors.append(ERROR_NOT_IN_BUNDLE)
 
         if (repo_fields.get("allow_squash_merge") or
-            repo_fields.get("allow_squash_merge")):
+            repo_fields.get("allow_rebase_merge")):
                 errors.append(ERROR_ONLY_ALLOW_MERGES)
         return errors