Keep GitHub Actions up to date with GitHub's Dependabot

[cclauss]

Auto-generates pull requests 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

Fixes software supply chain safety warnings like at the bottom right of https://github.com/TheAlgorithms/JavaScript/actions/runs/8960545794

• Keeping your actions up to date with Dependabot
• Configuration options for the dependabot.yml file - package-ecosystem

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Describe your change:

• [ ] Add an algorithm?
• [ ] Fix a bug or typo in an existing algorithm?
• [ ] Documentation change?

Checklist:

• [ ] I have read CONTRIBUTING.md.
• [ ] This pull request is all my own work -- I have not plagiarized.
• [ ] I know that pull requests will not be merged if they fail the automated tests.
• [ ] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• [ ] All new JavaScript files are placed inside an existing directory.
• [ ] All filenames should use the UpperCamelCase (PascalCase) style. There should be no spaces in filenames. Example:UserProfile.js is allowed but userprofile.js,Userprofile.js,user-Profile.js,userProfile.js are not
• [ ] All new algorithms have a URL in their comments that points to Wikipedia or another similar explanation.
• [ ] If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.