Add Edward Grefenstette testimonial to wall of love (#529)

web/app/testimonials.tsx

@@ -17,6 +17,15 @@ export const testimonials = [
     url: "https://x.com/schrockn/status/2025182278637207857",
     platform: "x" as const,
   },
+  {
+    name: "Edward Grefenstette",
+    handle: "@egrefen",
+    subtitle: "Director of Research at Google DeepMind",
+    avatar: "/avatars/egrefen.jpg",
+    text: "I've been using this all weekend and it's amazing.",
+    url: "https://x.com/egrefen/status/2026806171563184199",
+    platform: "x" as const,
+  },
   {
     name: "あさざ",
     handle: "@asaza_0928",