Updating README to indicate support for IE11

Change-Id: I881fe178075edb61633e6a4b3dca27419fc4fae4

README

@@ -27,7 +27,7 @@ The system requirements for the most recent version of Mahara are here:
 
   https://wiki.mahara.org/index.php/System_Administrator%27s_Guide/Requirements
 
-Mahara 1.8 requires:
+Mahara 1.9 requires:
 
  * Database:
  ** Postgres 8.3 or later
@@ -69,7 +69,7 @@ Mahara 1.8 requires:
  ** Chrome - 34.0
  ** Safari - 6.0
  ** Opera - 17.0
- ** IE - 8, 9, 10
+ ** IE - 9, 10, 11
 
 TRANSLATIONS: You can get language packs from: