Fix typo (becuase->because), PR11427

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145117 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/AutomaticReferenceCounting.html b/docs/AutomaticReferenceCounting.html
index 0265bbd..27d017c 100644
--- a/docs/AutomaticReferenceCounting.html
+++ b/docs/AutomaticReferenceCounting.html
@@ -581,7 +581,7 @@
 convert a value of retainable object pointer type to any
 non-retainable type, or vice-versa, is ill-formed.  For example, an
 Objective-C object pointer shall not be converted to <tt>void*</tt>. 
-As an exception, cast to <tt>intptr_t</tt> is allowed becuase such 
+As an exception, cast to <tt>intptr_t</tt> is allowed because such 
 casts are not transferring ownership. The <a href="#objects.operands.casts">bridged
 casts</a> may be used to perform these conversions where
 necessary.</p>