Fix spelling error in Search examples: aster -> master

Change-Id: I40f6d55ca58c156f892eddfa47abfac1ca8e735a
diff --git a/web/templates.go b/web/templates.go
index 0927de6..712a5a4 100644
--- a/web/templates.go
+++ b/web/templates.go
@@ -92,7 +92,7 @@
     <dt><a href="search?q=-%28Path File%29 Stream">-(Path File) Stream</a></dt><dd>search "Stream", but exclude files containing both "Path" and "File"</dd>
     <dt><a href="search?q=-Path%5c+file+Stream">-Path\ file Stream</a></dt><dd>search "Stream", but exclude files containing "Path File"</dd>
     <dt><a href="search?q=phone+r:droid">phone r:droid</a></dt><dd>search for "phone" in repositories whose name contains "droid"</dd>
-    <dt><a href="search?q=phone+b:master">phone b:aster</a></dt><dd>for Git repos, find "phone" in files in branches whose name contains "master".</dd>
+    <dt><a href="search?q=phone+b:master">phone b:master</a></dt><dd>for Git repos, find "phone" in files in branches whose name contains "master".</dd>
     <dt><a href="search?q=phone+b:HEAD">phone b:HEAD</a></dt><dd>for Git repos, find "phone" in the default ('HEAD') branch.</dd>
   </dl>
   </div>