Adding sprint 9

Author: annie-ye4

src/data/assignments.json

@@ -89,16 +89,16 @@
     },
     {
         "id":8,
-        "title":"Sprint 8: Privacy and Pathfinding (Part 2)",
+        "title":"Sprint 8: Privacy and Pathfinding",
         "link":"https://docs.google.com/document/d/1-0wl2OomALefs09ucuUZ6UXuIPimNQgBHerAjCRWHSI/edit?tab=t.0",
         "release": "10/27",
         "due": "11/1",
         "demos": "11/2-11/3 (synchronous)"
     },
     {
         "id":9,
-        "title":"Sprint 9: Pivot!",
-        "link":"",
+        "title":"Sprint 9: Privacy and Pathfinding 2",
+        "link":"https://docs.google.com/document/d/1vVee1mHqBNZI4eAAEf7J65uZ0XKL-AxKzU-h6Ll28Zs/edit?tab=t.0#heading=h.pee6crlpaxz6",
         "release": "11/3",
         "due": "11/8",
         "demos": "11/8 (by video)"