Add labeler GitHub action for docs

[IanMadd]

Description

Add the GitHub labeler action to automatically add the Documentation label to docs PRs.

Related Issue

Types of changes

• 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 change)
• Chore (non-breaking change that does not add functionality or fix an issue)

Checklist:

• I have read the CONTRIBUTING document.
• I have run the pre-merge tests locally and they pass.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• If Gemfile.lock has changed, I have used --conservative to do it and included the full output in the Description above.
• All new and existing tests passed.
• All commits have been signed-off for the Developer Certificate of Origin.

[netlify]

👷 Deploy Preview for chef-workstation processing.

Name	Link
🔨 Latest commit	e815311
🔍 Latest deploy log	https://app.netlify.com/sites/chef-workstation/deploys/657b721be392600007be7058

[sonarcloud]

Quality Gate passed

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See analysis details on SonarCloud

[sonarqube-for-infrastructure-prod]

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No Coverage information
No Duplication information