version_control: Switch to the apertisX packaging suffix

The Apertis packaging toolchain and pipelines have switched from the
`coX` packaging version suffix to `apertisX` to better distinguish the
work of the Apertis team from more Collabora-specific packages.

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

content/guides/version_control.md

@@ -75,7 +75,7 @@ project such as `dbus`, the git repositories follow these rules:
 - Each version of an Apertis package derived from a Debian package must
   have a local version suffix. If the Apertis package has no functional
   changes and the only difference from the upstream is metadata under
-  `debian/apertis/`, the suffix should be `co0`. Due to how Debian packaging
+  `debian/apertis/`, the suffix should be `apertis0`. Due to how Debian packaging
   tools work, this version change must be reflected in by adding a new entry
   at the top of `debian/changelog` with the distribution field set to
   `apertis`.