Configure GitHub's Dependabot for github-actions

[cclauss]

Autogenerates a pull request like

• https://github.com/TheAlgorithms/Python/pulls?q=is%3Apr+author%3Aapp%2Fdependabot
• https://github.com/TheAlgorithms/Rust/pulls?q=is%3Apr+author%3Aapp%2Fdependabot

that will fix the warnings at the bottom right of
https://github.com/TheAlgorithms/Rust/actions/runs/8351768968

• https://docs.github.com/en/code-security/dependabot/working-with-dependabot/keeping-your-actions-up-to-date-with-dependabot
• https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#package-ecosystem

Pull Request Template

Description

Please include a summary of the change and which issue (if any) is fixed.
A brief description of the algorithm and your implementation method can be helpful too. If the implemented method/algorithm is not so
well-known, it would be helpful to add a link to an article explaining it with more details.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I ran bellow commands using the latest version of rust nightly.
• I ran cargo clippy --all -- -D warnings just before my last commit and fixed any issue that was found.
• I ran cargo fmt just before my last commit.
• I ran cargo test just before my last commit and all tests passed.
• I added my algorithm to the corresponding mod.rs file within its own folder, and in any parent folder(s).
• I added my algorithm to DIRECTORY.md with the correct link.
• I checked COUNTRIBUTING.md and my code follows its guidelines.

Please make sure that if there is a test that takes too long to run ( > 300ms), you #[ignore] that or
try to optimize your code or make the test easier to run. We have this rule because we have hundreds of
tests to run; If each one of them took 300ms, we would have to wait for a long time.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.71%. Comparing base (9572098) to head (fa04887).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #690   +/-   ##
=======================================
  Coverage   94.71%   94.71%           
=======================================
  Files         293      293           
  Lines       23351    23351           
=======================================
  Hits        22118    22118           
  Misses       1233     1233           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[cclauss]

Generated:

• Bump actions/stale from 4 to 9 in /.github/workflows #691
• Bump actions/setup-python from 4 to 5 in /.github/workflows #692

[vil02]

@cclauss do you have the privileges to add CODECOV_TOKEN to Dependabot secrets in this repository?

[cclauss]

I do not. For the Python repo, I just asked around on

• https://matrix.to/#/#TheAlgorithms_community:gitter.im
• https://the-algorithms.com/discord

until someone set it up.