downgrade to Firefox 102.0.1 used by ember-source repository to run tests (#579)

.github/workflows/test-workflow.yml

@@ -90,8 +90,10 @@ jobs:
           node-version: '14.x'
       - name: Install node modules
         run: yarn install
-      - name: Install Firefox
-        run: sudo apt-get install firefox
+      - name: Setup firefox
+        uses: browser-actions/setup-firefox@latest
+        with:
+          firefox-version: 102.0.1
       - name: Build with test environment
         env:
           CI: true