Add Scoped Workflows directory to GitHub-actions manager

[meerumschlungen]

Tell us more.

Gitea supports Scoped Actions since v1.27.0 (go-gitea/gitea#38154).
Scoped Actions allow to specify central repositories on a user or organization level which may contain workflow actions which apply for each repository in the scope by default rather than adding the required workflow to each individual repository.
These workflows by default reside in .gitea/scoped_workflows/ inside the configured repository.
I'd like to suggest to extend the default managerFilePatterns regexes to include this directory for the github-actions manager to include these by default.
Before: (Ref: https://docs.renovatebot.com/modules/manager/github-actions/#default-config)

{
  "managerFilePatterns": [
    "/(^|/)(workflow-templates|\\.(?:github|gitea|forgejo)/(?:workflows|actions))/.+\\.ya?ml$/",
    "/(^|/)action\\.ya?ml$/"
  ]
}

Suggested:

{
  "managerFilePatterns": [
    "/(^|/)(workflow-templates|\\.(?:github|gitea|forgejo)/(?:workflows|actions|scoped_workflows))/.+\\.ya?ml$/",
    "/(^|/)action\\.ya?ml$/"
  ]
}

Manually overriding the config as suggested works fine for Renovate to manage dependencies.

[secustor]

Sounds reasonable, PR welcome.