docs: add github enterprise example

[dominik-ba]

No description provided.

[viceice]

I don't see much benefit for this 🤔

[dominik-ba]

if one wants to use this action on an enterprise instance one gets only abstract error messages about authentication. So a very small hint in the readme can help others from spending too much time on research why it fails ;)

I don't see much benefit for this 🤔

The very important point to your comment would be: Is there a disadvantage to enhancing docs?

[jdbruijn]

Indeed very similar to the existing example. THB, I have no strong opinion on whether or not to include it.

[dominik-ba]

Indeed very similar to the existing example. THB, I have no strong opinion on whether or not to include it.

It's not about the similarity but the important addition of the GitHub Enterprise url. It takes quite some time to find the important information how to configure this. I would expect something like this in the docs easily to find...