Add Abbie to PR review requests

[carlisia]

The currently used GH action to request PR reviews doesn't have the feature to add reviewers based on file type or path, so added a new one.

Keeping the current one because it does set the author to be the assignee of a PR.

Tested this on a personal repo and it works like so: PRs that contain .md files and/or contain files in the /site path will add Abbie as one of the two reviewers.

This system of requesting reviewers based on file/path is not ever going to be entirely perfect. In this case with doc PRs, I can think of a huge, very technical PR that has 1 inconsequential .md file requesting Abbie to review it. In this case, Abbie may exclude herself and randomly pick one of the maintainers.

@a-mccarthy is very excited about being automatically added as a reviewer for doc PRs!

Signed-off-by: Carlisia [email protected]

Please indicate you've done the following:

• Accepted the DCO. Commits without the DCO will delay acceptance.
• Created a changelog file or added /kind changelog-not-required.
• Updated the corresponding documentation in site/content/docs/main.

[ashish-amarnath]

I added some comments, PTAL.

[carlisia]

Let me try this change on my repo. I expect that the kentaro-m/[email protected]. action will fail because it won't recognize the content of the yaml file it is reading.

https://github.com/vmware-tanzu/velero/actions/runs/749498394

[carlisia]

Yeay, this works! There was a yaml formatting issue that I fixed.

I tested this on my repo to confirm that it works as intended.

[ashish-amarnath]

LGTM

[carlisia]

@zubron PTAL when you have a chance, thank you.

[carlisia]

@ashish-amarnath apparently your review was dismissed when I rebased this with main.

[dsu-igeek]

LGTM