Update specification wording to match s/config/account_data/

specification/modules/account_data.rst

@@ -3,16 +3,17 @@ Client Config
 
 .. _module:account_data:
 
-Clients can store their config on their homeserver. This config will be synced
+Clients can store custom config data for their account on their homeserver.
-between different devices and can persist across installations on a particular
+This account data will be synced between different devices and can persist
-device.
+across installations on a particular device. Users may only view the account
+data for their own account
 
-The config may be either global or scoped to a particular rooms.
+The account_data may be either global or scoped to a particular rooms.
 
 Events
 ------
 
-The client recieves the config as a event in the ``account_data`` sections
+The client recieves the account data as events in the ``account_data`` sections
 of a v2 /sync.
 
 These events can also be received in a v1 /events response or in the