Use updated github_response API in VulnTotal

Signed-off-by: Keshav Priyadarshi <git@keshav.space>

vulntotal/datasources/github.py

@@ -11,7 +11,7 @@
 from typing import Iterable
 
 from dotenv import load_dotenv
-from fetchcode.package_versions import github_response
+from fetchcode.utils import github_response
 from packageurl import PackageURL
 
 from vulntotal.validator import DataSource