Close the registration dropdown after a token reset

app/assets/javascripts/runner/components/registration/registration_dropdown.vue

@@ -76,13 +76,21 @@ export default {
     },
     onTokenReset(token) {
       this.currentRegistrationToken = token;
+
+      this.$refs.runnerRegistrationDropdown.hide(true);
     },
   },
 };
 </script>
 
 <template>
-  <gl-dropdown menu-class="gl-w-auto!" :text="dropdownText" variant="confirm" v-bind="$attrs">
+  <gl-dropdown
+    ref="runnerRegistrationDropdown"
+    menu-class="gl-w-auto!"
+    :text="dropdownText"
+    variant="confirm"
+    v-bind="$attrs"
+  >
     <gl-dropdown-item @click.capture.native.stop="onShowInstructionsClick">
       {{ $options.i18n.showInstallationInstructions }}
       <runner-instructions-modal

spec/features/admin/admin_runners_spec.rb

@@ -323,6 +323,8 @@ RSpec.describe "Admin Runners" do
         end
 
         it 'changes registration token' do
+          click_on 'Register an instance runner'
+
           click_on 'Click to reveal'
           expect(page_token).not_to eq token
         end