Minor tweaks in the translation strings

Author: javiereguiluz

app/Resources/translations/messages.en.xlf

@@ -324,11 +324,11 @@
 
             <trans-unit id="rss.title">
                 <source>rss.title</source>
-                <target>Symfony Demo Blog</target>
+                <target>Symfony Demo blog</target>
             </trans-unit>
             <trans-unit id="rss.description">
                 <source>rss.description</source>
-                <target>Most recent posts published on the Symfony Demo project blog</target>
+                <target>Most recent posts published on the Symfony Demo blog</target>
             </trans-unit>
         </body>
     </file>