Hide all comments with exception to the last about comment-hider

[kanga333]

Thank you for your feature request!

I thought that by running comment-hider at the beginning of the CI, I could keep only the comments from the latest CI. However, you're right that we need to exclude the latest comments in order to keep messages that don't occur every time, such as failed CI messages.

If you would like to contribute, I would welcome it 👍
I think it is better to take number of comments not to be hidden as input.

[prince-chrismc]

Thanks, I'll come back soon with a PR

[prince-chrismc]

#7