Keep GitHub Actions up to date with GitHub's Dependabot

[cclauss]

Automates the process of creating PRs like:

• 829

Fixes software supply chain safety warnings like at the bottom right of https://github.com/facebook/pyre-check/actions/runs/8517401397

Keeping your actions up to date with Dependabot

Configuration options for the dependabot.yml file - package-ecosystem

Pre-submission checklist

• [ ] I've ran the linters locally and fixed lint errors related to the files I modified in this PR. You can install the linters by running pip install -r requirements-dev.txt && pre-commit install
• [ ] pre-commit run

Summary

Test Plan

[kinto0]

Hi! We prefer our internal tools for this instead of github. If we change our stance on this, I'll reopen this PR.

[cclauss]

The first URL above demonstrates that the current tools are not working.

[cclauss]

@arthaud @0xedward Your reviews, please.

Automates the process of creating PRs like:

• 829

[arthaud]

We aren't able te reopen because "The patch-1 branch has been deleted". Could you recreate the branch or open another PR? Thanks.

[cclauss]

I have restored the deleted branch but I do not have the access rights to reopen the closed pull request.

[facebook-github-bot]

@arthaud has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[cclauss]

For test failures on Python < 3.10 see:

• 832

[cclauss]

@arthaud Thanks much for all your help today.

• https://github.com/facebook/pyre-check/pulls?q=is%3Apr+author%3Acclauss

[facebook-github-bot]

@arthaud merged this pull request in facebook/pyre-check@1e34cd5c9efa418bf28ccd9b9ed1299a0ea62601.

[cclauss]

Generated:

• 834