Update readme.md

Author: perrysk-msft

samples/manage/windows-containers/readme.md

@@ -1,3 +1,3 @@
 ## Windows Containers
 This includes samples for setting up mssql-server in Windows Containers. Currently it includes the following:
-- __[mssql-server-2014-express-windows] (mssql-server-2014-express-windows /)__
+- __[mssql-server-2014-express-windows] (mssql-server-2014-express-windows/)__