fix: Add missing response fields returned by the live API (#821)

This PR updates the auto-generated Pydantic models and TypedDicts based
on OpenAPI specification changes in [apify-docs PR
#2561](apify/apify-docs#2561).

---------

Co-authored-by: Vlada Dusek <v.dusek96@gmail.com>

Author: apify-service-account

src/apify_client/_literals.py

@@ -473,6 +473,7 @@
     'GIT_REPO',
     'TARBALL',
     'GITHUB_GIST',
+    'SOURCE_CODE',
 ]