Our new directory structure is deeper, so expand this search.

Signed-off-by: Matt Moyer <moyerm@vmware.com>

hack/module.sh

@@ -30,7 +30,7 @@ function with_modules() {
   cmd="$(${cmd_function})"
 
   pushd "${root_dir}"
-  for mod_file in $(find . -maxdepth 3 -name go.mod); do
+  for mod_file in $(find . -maxdepth 4 -name go.mod); do
     mod_dir="$(dirname "${mod_file}")"
     (
       echo "=> " && \
@@ -56,4 +56,4 @@ function main() {
   esac
 }
 
-main "$@"
+main "$@"