release tag.

llvm-svn: 46982

llvm/docs/GettingStarted.html

@@ -710,6 +710,7 @@ revision), you can checkout it from the '<tt>tags</tt>' directory (instead of
   subdirectories of the '<tt>tags</tt>' directory:</p>
 
 <ul>
+<li>Release 2.2: <b>RELEASE_22</b></li>
 <li>Release 2.1: <b>RELEASE_21</b></li>
 <li>Release 2.0: <b>RELEASE_20</b></li>
 <li>Release 1.9: <b>RELEASE_19</b></li>