docs: first release candidate from zero for new releases

[phisco]

Description of your changes

Release candidates should start from zero.

I have:

• [x] Read and followed Upbound's contribution process.
• [x] Run make reviewable to ensure this PR is ready for review.
• [ ] ~Added backport release-x.y labels to auto-backport this PR, as appropriate.~

How has this code been tested

N.A.