news.html: fix 2011.08 release date

Thanks to Michael S. Zick for noticing.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

docs/news.html

@@ -5,7 +5,7 @@
 <p>
 
 <ul>
-  <li><b>32 August 2011 -- 2011.08 released</b>
+  <li><b>31 August 2011 -- 2011.08 released</b>
 
     <p>The stable 2011.08 release is out - Thanks to everyone
     contributing and testing the release candidates. See the