update(docs): add how to use autogenerated release notes from GitHub (#…

…557)

docs/development/releasing.md

@@ -1,11 +1,27 @@
 # Release workflow
 
-1. Fill the `CHANGELOG.md`
+1. Fill the `CHANGELOG.md` with the new version. You can write it manually or use the auto-generated release notes by Github:
+    1. Go to [project's releases](https://github.com/Guts/qgis-deployment-cli/releases) and click on `Draft a new release`
+    1. In `Choose a tag`, enter the new tag (obviously complying with [SemVer](https://semver.org/))
+    1. Click on `Generate release notes`
+    1. Copy/paste the generated text from `## What's changed` until the line before `**Full changelog**:...` in the CHANGELOG.md replacing `What's changed` with the tag and the publication date
 1. Change the version number in `__about__.py`
-1. Commit changes with a message like `Bump version to X.x.x` to the main branch
+1. Commit changes with a message like `release: bump version to X.x.x` to the main branch
 1. Apply a git tag with the relevant version: `git tag -a 0.3.0 {git commit hash} -m "New awesome feature"`
 1. Push commit and tag to main branch: `git push --tags`
 
+If things go wrong (failed CI/CD pipeline, missed step...), here comes the fix process:
+
+```sh
+git tag -d old
+git push origin :refs/tags/old
+git push --tags
+```
+
+And try again!
+
+----
+
 ## Manual upload to PyPi
 
 > This method requires an API token on PyPi