add German translation for "no posts found"

Author: xabbuh

app/Resources/translations/messages.de.xliff

@@ -195,6 +195,10 @@
  <source>post.no_comments</source>
  <target>Hinterlasse als Erste/r einen Kommentar zu diesem Beitrag.</target>
  </trans-unit>
+ <trans-unit id="post.no_posts_found">
+ <source>post.no_posts_found</source>
+ <target>Keine Beiträge gefunden.</target>
+ </trans-unit>
 
  <trans-unit id="help.app_description">
  <source>help.app_description</source>