Fix url escape quote in python pydantic v1 client

Author: joostsijm

modules/openapi-generator/src/main/resources/python-pydantic-v1/api_client.mustache

@@ -584,7 +584,7 @@ class ApiClient:
             if k in collection_formats:
                 collection_format = collection_formats[k]
                 if collection_format == 'multi':
-                    new_params.extend((k, str(value)) for value in v)
+                    new_params.extend((k, quote(str(value))) for value in v)
                 else:
                     if collection_format == 'ssv':
                         delimiter = ' '