Support numeric public key ids for actions

[Azuka]

closes #1835

[google-cla]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please visit https://cla.developers.google.com/ to sign.

Once you've signed (or fixed any issues), please reply here with @googlebot I signed it! and we'll verify it.

---

What to do if you already signed the CLA

Individual signers

• It's possible we don't have your GitHub username or you're using a different email address on your commit. Check your existing CLA data and verify that your email is set on your git commits.

Corporate signers

• Your company has a Point of Contact who decides which employees are authorized to participate. Ask your POC to be added to the group of authorized contributors. If you don't know who your Point of Contact is, direct the Google project maintainer to go/cla#troubleshoot (Public version).
• The email used to register you as an authorized contributor must be the email used for the Git commit. Check your existing CLA data and verify that your email is set on your git commits.
• The email used to register you as an authorized contributor must also be attached to your GitHub account.

ℹ️ Googlers: Go here for more info.

[codecov]

Codecov Report

Merging #1836 (8d9280e) into master (3130b78) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1836   +/-   ##
=======================================
  Coverage   97.56%   97.56%           
=======================================
  Files         104      104           
  Lines        6602     6618   +16     
=======================================
+ Hits         6441     6457   +16     
  Misses         87       87           
  Partials       74       74           

Impacted Files	Coverage Δ
github/actions_secrets.go	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3130b78...8d9280e. Read the comment docs.

[gmlewis]

Thank you, @Azuka .
Please address the comments below.

[Azuka]

@gmlewis thanks for reviewing. I've made the suggested changes

[gmlewis]

@gmlewis thanks for reviewing. I've made the suggested changes

Thank you, @Azuka. In the future, please don't force-push to PRs in this repo, as it makes it really difficult for the reviewers to see what changed since the last review.

[Azuka]

@gmlewis thanks for reviewing. I've made the suggested changes

Thank you, @Azuka. In the future, please don't force-push to PRs in this repo, as it makes it really difficult for the reviewers to see what changed since the last review.

I'm really sorry, I missed that.

[gmlewis]

I'm really sorry, I missed that.

No problem. Next time. 😂

[gmlewis]

Thank you, @Azuka !
LGTM.

Awaiting second LGTM before merging.

[wesleimp]

💙

[gmlewis]

Thank you, @wesleimp .
Merging.