Use webpack_bundle_tag instead of deprecated page_specific_javascript_bundle_tag

app/views/dashboard/groups/index.html.haml

@@ -2,8 +2,8 @@
 - header_title  "Groups", dashboard_groups_path
 = render 'dashboard/groups_head'
-= page_specific_javascript_bundle_tag('common_vue')
-= page_specific_javascript_bundle_tag('groups')
+= webpack_bundle_tag 'common_vue'
+= webpack_bundle_tag 'groups'
 - if @groups.empty?
   = render 'empty_state'