Wording tweaks

UPGRADE.rst

@@ -12,10 +12,9 @@ Servers which use captchas will need to add their public key to::
 This is required in order to support registration fallback (typically used on
 mobile devices).
 
-Servers which have registered application services need to upgrade their
-database as the format of stored application services has changed in Synapse.
-Run ``python upgrade_appservice_db.py <database file path>`` to convert to the
-new format.
+The format of stored application services has changed in Synapse. You will need
+to run ``python upgrade_appservice_db.py <database file path>`` to convert to 
+the new format.
 
 Upgrading to v0.7.0
 ===================