Adjust appdata summary

Signed-off-by: Jacki <jacki@thejackimonster.de>

resources/ch.theologeek.Manuskript.appdata.xml

@@ -7,7 +7,7 @@
 	<content_rating type="oars-1.1" />
 
 	<name>Manuskript</name>
-	<summary>An open-source tool for writers</summary>
+	<summary>Unleash the creator within you</summary>
 	<description>
 		<p>Manuskript provides a rich environment to help writers create their first draft and then further refine and edit their masterpiece.</p>
 		<p>With Manuskript you can:</p>