whatsnew/version0.9.txt: Fix 'mulitple' -> 'multiple' typo

docs/source/whatsnew/version0.9.txt

@@ -73,7 +73,7 b' New features'
 
 * The parallel function capabilities have been reworks.  The major changes are
   that i) there is now an `@parallel` magic that creates parallel functions,
-  ii) the syntax for mulitple variable follows that of `map`, iii) both the
+  ii) the syntax for multiple variable follows that of `map`, iii) both the
   multiengine and task controller now have a parallel function implementation.
 
 * All of the parallel computing capabilities from `ipython1-dev` have been