Fix link and title of the early design doc

rfc9000.md

@@ -82,11 +82,11 @@ normative:
 informative:
 
   EARLY-DESIGN:
-    title: "QUIC: Multiplexed Transport Over UDP"
+    title: "QUIC: Multiplexed Stream Transport Over UDP"
     author:
       - ins: J. Roskind
     date: 2013-12-02
-    target: "https://goo.gl/dMVtFi"
+    target: "https://docs.google.com/document/d/1RNHkx_VvKWyWg6Lr8SZ-saqsQx7rFV-ev2jRFUoVD34/edit?usp=sharing"
 
   SLOWLORIS:
     title: "Welcome to Slowloris - the low bandwidth, yet greedy and poisonous HTTP client!"