Update releasing instructions to use script

releasing.md

@@ -1,11 +1,11 @@
 # Releasing mjolnir
 
-1. Create a new branch and edit the `version` variable of `package.json` to reflect the new version
-2. Once that branch has been merged, switch back to the main branch and pull in the new changes
-3. Tag the new version, ie `git tag -s vX.Y.Z` (where vX.Y.Z is the new version), and push the tag
-4. Once the tag has been pushed, draft a new release on github: https://github.com/matrix-org/mjolnir/releases/new,
-using the Generate release notes button to automatically create the release notes/changelog
-5. Double-check that everything is correct and make any changes as necessary, then publish the release
-6. Publishing the release should kick off a Github Action to build and push the release to Dockerhub -
-verify that this did occur successfully
+1. Make sure all the things you want have landed on the main branch.
+2. Run yarn version --patch (or --minor or --major, see documentation) to create the tag and update the versioning.
+3. Push main and the tag to the repo (e.g. git push --atomic origin main v1.3.0).
+4. Docker Hub will automatically start building the images required.
+5. Create a new github release, freehanding the changelog from a prior release (copy/paste, edit as needed). Github's 
+   auto-changelog is good to press at the beginning to make sure you don't miss anything. Remember to check recently 
+   closed issues and thank the reporters.
+6. Update the room topic of #mjolnir:matrix.org to mention the latest version.