Problem: Outdated documentation links

[jens-st]

Version of the documentation

Page (and section, if applicable) where the issue occurs

• https://github.com/archivematica/Issues/blob/main/CONTRIBUTING.md

Description of the issue

• link to https://github.com/artefactual/archivematica/blob/stable/1.11.x/CONTRIBUTING.md

Suggested fix

• Link to the most current version of the contribution guide? (https://github.com/artefactual/archivematica/blob/qa/1.x/CONTRIBUTING.md)
• Are the .md files in https://github.com/archivematica/Issues/tree/main up-to-date?

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For Artefactual use:

Before you close this issue, you must check off the following:

• All pull requests related to this issue are properly linked
• All pull requests related to this issue have been merged
• Details about this issue have been added to the release notes (if applicable)