fix verify-release.sh to understand go directive better

Currently it fails to do the vulnerability scan if the go directive
has golang patch version in it, like "1.22.3", as it replaces "1.22"
with "1.22.5" it finds from Dockerfile, resulting to "1.22.5.3"
which blows up.

Signed-off-by: Tuomo Tanskanen <tuomo.tanskanen@est.tech>

hack/verify-release.sh

@@ -636,7 +636,7 @@ _mutate_gomod_files_for_osv_scanner()
         <(_get_golang_version_from_dockerfile)
 
     for modfile in **/go.mod; do
-        sed -i.bak -e "s/^go [[:digit:]]\.[[:digit:]]\+/go ${tag}/" "${modfile}"
+        sed -i.bak -e "s/^go .*$/go ${tag}/" "${modfile}"
     done
 }