ci: redirect adev to index.csr.html (angular#63168)

The build doesn't produce an `index.html`

PR Close angular#63168

Author: JeanMeche

adev/firebase.json

@@ -67,7 +67,7 @@
     "rewrites": [
       {
         "source": "**",
-        "destination": "/index.html"
+        "destination": "/index.csr.html"
       }
     ]
   }