dependabot: support github-actions updates

[mmorel-35]

Please add a summary of your change

dependabot: support github-actions updates

Does your change fix a particular issue?

Fixes #6628

This will also help fix warning from github-actions like :

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/labeler@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

Or even worse:

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/labeler@v3. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

Please indicate you've done the following:

• Accepted the DCO. Commits without the DCO will delay acceptance.
• Created a changelog file or added /kind changelog-not-required as a comment on this pull request.
• Updated the corresponding documentation in site/content/docs/main.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.84%. Comparing base (3d6dab0) to head (b52b0a9).
Report is 15 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7594   +/-   ##
=======================================
  Coverage   61.84%   61.84%           
=======================================
  Files         265      265           
  Lines       29356    29356           
=======================================
  Hits        18155    18155           
  Misses       9913     9913           
  Partials     1288     1288           

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[mateusoliveira43]

please link issue #6628

[qiuming-best]

@mmorel-35 Sorry, I'm not sure how these configurations work in your PR.

Is it that if we enable github-actions dependencies update, once some actions use node.js or some other dependencies in the environment it will check and install the latest dependencies?

If we didn't enable it, actions will use the default dependencies in the environment?

[mmorel-35]

Once this is merged it will create PR for your github actions. What I meant is that the github actions in velero are not up to date with dependabot the project will receive PR (checked once a week in the proposed configuration) for each new version of a github action.
I have enabled this on my fork, please have a look to see what this does.
Of course each maintainer of the used action is responsible for updating to the most recent node version. And I believe it's already done by most of them.

[qiuming-best]

@blackpiglet @ywk253100 Please also help to evaluate the effect when enabling the github-actions updates.