Set no results text

ee/app/assets/javascripts/on_demand_scans/components/on_demand_scans_form.vue

@@ -437,6 +437,8 @@ export default {
           :translations="{
             dropdownHeader: __('Select a branch'),
             searchPlaceholder: __('Search'),
+            noRefSelected: __('No available branches'),
+            noResults: __('No available branches'),
           }"
         />
         <div v-if="!defaultBranch" class="gl-text-red-500 gl-mt-3">

locale/gitlab.pot

@@ -20769,6 +20769,9 @@ msgstr ""
 msgid "No authentication methods configured."
 msgstr ""
 
+msgid "No available branches"
+msgstr ""
+
 msgid "No available groups to fork the project."
 msgstr ""