[gnome-software/1595-please-document-how-to-use-packaging-format-preference-setting] gschema: Name example packaging formats in the 'packaging-format-preference' description

[Milan Crha <mcrha src gnome org>]

commit d7b67a311031498e21d108c7bf9f4dc7ab6f4a09
Author: Milan Crha <mcrha redhat com>
Date:   Wed Jan 12 12:05:22 2022 +0100

    gschema: Name example packaging formats in the 'packaging-format-preference' description
    
    This gives a clue to the users what values they can use. There are more
    possibilities (currently: appimage, cabinet, deb, flatpak, fwupd,
    limba, package, rpm, snap, tarball), but name only the most commonly used.
    
    Closes https://gitlab.gnome.org/GNOME/gnome-software/-/issues/1595

 data/org.gnome.software.gschema.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/org.gnome.software.gschema.xml b/data/org.gnome.software.gschema.xml
index 851202a90..895ac4389 100644
--- a/data/org.gnome.software.gschema.xml
+++ b/data/org.gnome.software.gschema.xml
@@ -141,7 +141,7 @@
     </key>
     <key name="packaging-format-preference" type="as">
       <default>['']</default>
-      <summary>Priority order of packaging formats to prefer, with more important formats listed first. An 
empty array means the default order. Omitted formats are assumed to be listed last.</summary>
+      <summary>Priority order of packaging formats to prefer, with more important formats listed first. An 
empty array means the default order. Omitted formats are assumed to be listed last. Example packaging formats 
are: deb, flatpak, rpm, snap.</summary>
     </key>
     <child name="auth" schema="org.gnome.software.auth"/>
     <key name="upgrade-background-uri" type="s">