chore(docs): updates URLs and tagging instructions used in release proce...

...ss workflow

- The URLs were pointing to the old server
- Tagging instructions are now clearer
You do not want to tag the merge commit as 1.9.x because it may include commits that were merged since since you generated the changelog. This will result in commits getting lost/forgotten in changelogs. Low possibility, but tagging the release-* branch was intentional.