fix: prevent chance of rate limits when querying GitHub because of unauthenticated calls; fix tests, upgrade deprecated dependency

[faubion-hbo]

Problem

the unauthenticated limit to calling GitHub's API is 60/hour, and this limit is assigned to the IP address of the caller. in rare cases, you could be be running this action on a runner that has had its limit exhausted by other users which will cause this action to fail due to getting a rate limit error response. this is more likely to occur on self-hosted runners, especially if a runner label that maps to few individual runners is frequently used.

Solution

the env var GITHUB_TOKEN is set to a provisioned token for each action run, so its limits are isolated (and much higher); therefore, if we use it in the Octokit client then the only way an error can occur is if the action run exhausts the limit itself.

Additionally...

• fixed test.js to pass and added comments to give future devs a heads up
• upgraded actions/core dependency as current version is deprecated (pending deletions)

[linux-foundation-easycla]

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[admin-tecio]

would be great to see this implemented, please push this
thank you very much !