docs: meson: Sort list of RST files to build

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

docs/meson.build

@@ -72,13 +72,13 @@ docs_rst_files = [
   'formatbackup',
   'formatcheckpoint',
   'formatdomain',
-  'formatnetworkport',
   'formatdomaincaps',
+  'formatnetworkport',
   'formatsecret',
   'formatsnapshot',
   'formatstorage',
-  'formatstorageencryption',
   'formatstoragecaps',
+  'formatstorageencryption',
   'glib-adoption',
   'goals',
   'governance',