Fix forgotten reference to new vmod name.
Fix forgotten reference to new vmod name.

mbgrydeland/libvmod-fsbackend,Dridi/libvmod-example,varnish/libvmod-example,aondio/libvmod-rtfrontend,aondio/libvmod-rtfrontend,Dridi/libvmod-example,aondio/libvmod-cowsay,aondio/libvmod-rtfrontend,mbgrydeland/libvmod-fsbackend,aondio/libvmod-cowsay,varnish/libvmod-example