[FIX] -- mkdocs repo links to correct GitHub organization.

[DhavalGojiya]

Fixes broken GitHub links in documentation

This PR updates the MkDocs configuration to point to the correct GitHub organization and repository.

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🐞 What’s the issue?

Currently, issue and PR links in the documentation (e.g. changelog) incorrectly point to:

https://github.com/dsoftware-inc/django-tasks-scheduler

Instead of the correct repo:

https://github.com/django-commons/django-tasks-scheduler

This causes links like #273 to open under the wrong user/org, resulting in 404 errors.

🔗 You can see this in action on the public changelog here:
https://django-tasks-scheduler.readthedocs.io/en/stable/changelog/

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🔧 What this PR changes

• Updates repo_name and user in mkdocs.yml from dsoftware-inc → django-commons
• Ensures all shorthand issue and PR links generate URLs pointing to the correct repository
• Fixes broken links in the rendered documentation (e.g. changelog)

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📸 Before (Broken Links)

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✅ After (Fixed Links)

After this PR, clicking an issue reference like #273 will correctly open:

https://github.com/django-commons/django-tasks-scheduler/issues/273

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📌 Next Steps

• Merge this PR
• Rebuild and deploy updated documentation via ReadTheDocs

Thanks!