Fix typo.

llvm-svn: 83770

llvm/docs/ReleaseNotes-2.6.html

@@ -675,7 +675,7 @@ it run faster:</p>
     by OS kernels.</li>
 <li>X86-64 now models implicit zero extensions better, which allows the code
     generator to remove a lot of redundant zexts.  It also models the 8-bit "H"
-    registers as sugregs, which allows them to be used in some tricky
+    registers as subregs, which allows them to be used in some tricky
     situations.</li>
 <li>X86-64 now supports the "local exec" and "initial exec" thread local storage
     model.</li>