Upgrade erblint-github to v0.5.1

[camertron]

What are you trying to accomplish?

This PR upgrades erblint-github to the latest version, v0.5.1.

Integration

No changes necessary in production 👍

List the issues that this change affects.

Fixes https://github.com/github/primer/issues/2834

Risk Assessment

• Low risk the change is small, highly observable, and easily rolled back.
• Medium risk changes that are isolated, reduced in scope or could impact few users. The change will not impact library availability.
• High risk changes are those that could impact customers and SLOs, low or no test coverage, low observability, or slow to rollback.

What approach did you choose and why?

Bumped the gem and ran it, correcting all violations.

Accessibility

• No new axe scan violation - This change does not introduce any new axe scan violations.

[changeset-bot]

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Latest commit: feb0d86

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[jonrohan]

I guess dependabot didn't take care of this because it's set to monthly in the config. Should we update to weekly?

[camertron]

Hmm not sure. We were getting dinged by it on our scorecard. Probably couldn't hurt to upgrade to weekly.