Be a bit more precise on the delay but without promising too much

wiki/src/news/version_2.9.mdwn

@@ -39,8 +39,8 @@ feature|doc/first_steps/persistence/configure#additional_software]].
 </ul>
   
 <p>
-We will release Tails 2.9.1 the next few days with a
-fix for this issue.
+We will release Tails 2.9.1 to fix this issue before the end of the
+week.
 </p>
 
 </div>