Update firebase.json (#12497)

Author: sigurdm

firebase.json

@@ -687,6 +687,7 @@
       { "source": "/go/ui-imitation-games", "destination": "https://docs.google.com/document/d/1SbMjMiFhD2OZGTT3TCAOx6yfG-SYQ5F_fn7wwlZMumM/edit", "type": 301 },
       { "source": "/go/union-typed-transform-stack-in-hit-test", "destination": "https://docs.google.com/document/d/1EsH7g-oyQIDZpRteg94iKJKgD7kVngZWq9ngDe6ORbM/edit?usp=sharing", "type": 301 },
       { "source": "/go/unobstructed-platform-views", "destination": "https://docs.google.com/document/d/1_P3wa_nMqnhKsy-lDlNxT9GThZX2WhfVym4O4M7Q9qs/edit#", "type": 301 },
+      { "source": "/go/unpin-flutter-sdk-dependencies", "destination": "https://docs.google.com/document/d/1eq7DU0DvNwjlQRbA_euts91OXncUXtBomxDNCr60lb4/edit?usp=sharing", "type": 301 },
       { "source": "/go/unwrapping-widget-keys", "destination": "https://docs.google.com/document/d/1Fc9ZYTTxlJUAfGeQzf83wXuV-wSiRZFHhMgwoUNukhI", "type": 301 },
       { "source": "/go/update-psc", "destination": "https://docs.google.com/document/d/12OQx7h8UQzzAi0Kxh-saDC2dg7h2fghCCzwJ0ysPmZE/edit?usp=sharing&resourcekey=0-ATO-1Er3HO2HITm59I0IdA", "type": 301 },
       { "source": "/go/update-scrollbars", "destination": "https://docs.google.com/document/d/1mRlc-sRyadE6301aZsD1LJkPG2B9K97Bg_GDHvFhMQI/edit?usp=sharing&resourcekey=0-v4Gk8H280RaPo5qClmDqpA", "type": 301 },