Fix README quick start prompt numbering.

README.txt

@@ -20,7 +20,7 @@ Quick start (client usage):
   ...
   7> AccessTokenURL = "http://term.ie/oauth/example/access_token.php".
   ...
-  6> {ok, ResponseA} = oauth:get(AccessTokenURL, [], Consumer, TokenR, TokenSecretR).
+  8> {ok, ResponseA} = oauth:get(AccessTokenURL, [], Consumer, TokenR, TokenSecretR).
   ...