Support for Github HTTPS compatibility

[BBBmau]

Spent a lot of time trying to figure out why changelog entry was not working. Took my teammate time to figure it out mainly from looking through the code base to see that a git url would work and not an HTTPS url. Support should probably be made for both or at least be mentioned somewhere in the documentation.

QUICK FIX: git remote set-url origin git@github.com:hashicorp/terraform-provider-helm.git will most likely solve many peoples issues