contrib guide: broken links and release versioning

[miacycle]

Signed-off-by: miacycle [email protected]

1. Fix two broken links
2. Comment out section on releasing docs / versioning of docs. Not something is currently done.

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[leecalcote]

Merge conflicts

[leecalcote]

@zihanKuang will you take over this PR?

[miacycle]

Please!

[hortison]

@zihanKuang, will be working this one?

[zihanKuang]

Yes, I will take over this PR and resolve the merge conflicts.👍