Add some docs explaining the release process

Also, unrelated, fix a link to point to new phpcs repo.

README.md

@@ -16,7 +16,7 @@
 
 ## Information
 
-This repository contains the Moodle Coding Style configurations, written as [PHP CodeSniffer](https://github.com/squizlabs/PHP_CodeSniffer) rulesets.
+This repository contains the Moodle Coding Style configurations, written as [PHP CodeSniffer](https://github.com/PHPCSStandards/PHP_CodeSniffer) rulesets.
 
 Two coding styles are included:
 

docs/ReleaseNewVersion.md

@@ -0,0 +1,36 @@
+# Releasing a new version
+
+
+This is a guide on how to release a new version of this project. Remember that
+when considering the version number to use, that this project follows
+[Semantic Versioning](http://semver.org/), so bump the version number accordingly.
+
+Also, note that, for the logs, we follow the [Keep a CHANGELOG](https://keepachangelog.com)
+format (sections order, lists, ...) as much as possible.
+
+Prior to tagging a release, ensure the following have been updated:
+
+* The `CHANGELOG.md` needs to be up-to-date.  In addition, the _Unreleased_ section
+  needs to be updated with the version being released.  Also update the _Unreleased_
+  link at the bottom with the new version number and add the new link there.
+
+
+When all the changes above have been performed and triple-checked,
+**create a commit** (*"Prepare for vX.Y.Z release"*) and
+**push it straight upstream** to `main`.
+
+Once all code and commits are in place and verified, you need to tag a
+release. Tag `main` branch `HEAD` and push using commands (don't forget the
+leading "`v`"):
+
+```bash
+$ git tag -a vX.Y.Z -m "Release version vX.Y.Z"
+$ git push origin vX.Y.Z
+```
+
+When the tag is pushed, GitHub release workflow will be triggered. Verify it has
+worked correctly by navigating at
+[Releases](https://github.com/moodlehq/moodle-cs/releases).
+
+While in that page, optionally, you can edit the release and add any content
+to the description, though **it's not recommended** because that may lead to double release notifications here and there.