🌱 Added test cases for list.go and github.go

[irapandey]

What this PR does / why we need it:
This PR adds unit tests for release note generator to add more coverage to non-covered functions

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

#11368

/area testing

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @irapandey. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[irapandey]

Hey @chandankumar4 - Can you take a look here
Thanks 😄

[chrischdi]

/ok-to-test