Expand on the usage of OMNIBUS_RELEASE in the package version

doc/package-information/README.md

@@ -10,6 +10,16 @@ The Omnibus GitLab package is bundled with all dependencies required for GitLab
 to function correctly. More details can be found
 at [bundling dependencies document](omnibus_packages.md).
+## Package Version
+
+The released package versions are in the format `MAJOR.MINOR.PATCH-EDITION.OMNIBUS_RELEASE`
+
+| Component         | Meaning | Example |
+| ---------         | ------- | ------- |
+| MAJOR.MINOR.PATCH | The GitLab version this corresponds to | 13.3.0 |
+| EDITION           | The edition of GitLab this corresponds to | ee |
+| OMNIBUS_RELEASE   | The omnibus release. Usually, this will be 0. This will be incremented if we need to build a new package without changing the GitLab version. | 0 |
+
 ## Licenses
 See [licensing](licensing.md)