Update patch SUPEE-1868 readme file

Author: akai-z

patches/SUPEE-1868/README.md

@@ -1,4 +1,4 @@
 Update of USPS method names and integration from July 2013 to support USPS changes to their Priority and Express shipping options - Added Sep 23, 2014
 
-Note: This patch is applicable only to Magento Community Edition 1.7 and 1.8.
+Note: This patch is applicable only to Magento Community Edition 1.7 and 1.8.  
 The patch was released previously - double check if it is not already installed before applying.