docs: simplify release process (#10870)

* chore: simplify and update

* docs: streamline release checklist

- reduce from 128 to 113 lines while preserving all information
- add clarity on command execution context (which branch/directory)
- improve dangerous operation warnings (point of no return)
- consolidate prerequisites into checklist format
- clarify cherry-pick -x rationale (traceability and deduplication)
- explain why release branches are kept (patch releases)
- add fetch step to prevent stale branch issues
- simplify social media into single optional item
- add STOP checkpoint after tag push for docker verification

* docs: update release checklist last updated reference

* docs: remove GOPATH requirement from release checklist

mkreleaselog now works from any directory where kubo is checked out

* docs: clarify merge process in release checklist

add step to merge master into merge-release branch first
and specify "Create a merge commit" option explicitly

* docs: address PR #10870 feedback

- update forum example to v0.37.0
- add social media post examples from v0.36.0
- add example for creating next release issue

* docs: update blog example to kubo v0.36.0 commit

Author: lidel