Install all browsers; CI not seeing install

.github/workflows/test.yml

@@ -35,9 +35,10 @@ jobs:
           pip install pytest pytest-playwright
 
       - name: Install browsers
+        # TODO: Why doesn't work to just install chromium now?
         # Install just one browser instead of the default three.
         # https://playwright.dev/python/docs/browsers#managing-browser-binaries
-        run: playwright install chromium
+        run: playwright install
 
       - name: Run end-to-end test
         # We want to make sure there aren't hidden dependencies