Fix #1443 Update import in vulntotal datasources

[poju3185]

Fix #1443

Change the usage of vulnerabilities.utils.fetch_github_graphql_query to fetchcode.package_versions.github_response in github.py

[keshav-space]

@poju3185 please add signoff to your commit, and you may want to go through this https://aboutcode.readthedocs.io/en/latest/contributing/writing_good_commit_messages.html.

[poju3185]

I've updated my commit with the sign-off. Thanks for the reminder!