Requires failure. Updates text.

Author: DellaBitta

.github/workflows/nightly-js-sdk.yaml

@@ -70,16 +70,17 @@ jobs:
     - name: Launch E2E tests workflow
       run: yarn test
     - name: Send email on failure
+      if: failure()
       uses: ./.github/actions/send-email
       with:
         api-key: ${{ secrets.OSS_BOT_MAILGUN_KEY }}
         domain: ${{ secrets.OSS_BOT_MAILGUN_DOMAIN }}
         from: 'GitHub <admin-github@${{ secrets.OSS_BOT_MAILGUN_DOMAIN }}>'
         to: ${{ secrets.FIREBASE_NEXTJS_TESTS_GITHUB_EMAILS }}
-        subject: 'Nightly build ${{github.run_id}} of ${{github.repository}} failed!'
+        subject: 'Nightly build of ${{github.repository}} failed!'
         html: >
-          <b>Nightly workflow ${{github.run_id}} failed on: ${{github.repository}}</b>
-          <b>THIS IS ONLY A TEST</b>
+          <b>The nightly workflow to test the Firebase JS SDK failed on: ${{github.repository}}</b>
           <br /><br />Navigate to the
-          <a href="https://github.com/FirebaseExtended/firebase-sdk-nextjs-tests/actions/runs/${{github.run_id}}">failed workflow</a>.
+          <a href="https://github.com/FirebaseExtended/firebase-sdk-nextjs-tests/actions/runs/${{github.run_id}}">failed workflow</a>
+          to look further into what went wrong.
       continue-on-error: true