Emphasize on the extra care needed for package base-files

Because base-files is important as in it contains all the necessary
metadata pertaining to the release, ensure that it is built proper.

Signed-off-by: Ritesh Raj Sarraf <ritesh.sarraf@collabora.com>

content/guides/apertis_release_process.md

@@ -135,6 +135,8 @@ Host images.apertis.org
   * Set the protection settings onto all `apertis/*` branches, which were unprotected in the initial release steps
 * Manually branch the [base-files](https://gitlab.apertis.org/pkg/base-files/) package, after the new docker images have been built.
   * This step should automatically update the release specific attributes in the new package and auto propose the changes through a new merge request
+  * Validate the newly created pipeline ensuring that it generates the right set of changes with respect to the new release.
+  * Validate the new package is built proper and pushed to OBS and the APT repositories
 
 ## Build Suffix