Change reference to cflinuxfs3 [#159705348]

Author: mlimonczenko

migrating.html.md.erb

@@ -36,7 +36,7 @@ Perform the following steps:
   cf-diego  garden-runc/1.9.0     bosh-aws-xen-hvm-ubuntu-trusty-go\_agent/3421.11  -        none
               grootfs/0.21.0
               cf-networking/1.2.0
-              cflinuxfs2/1.138.0
+              cflinuxfs3/1.138.0
               diego/1.23.0
               cf/268
   </pre>