Update funding.json

Update for Retro Funding round 4 production (the previous version was for the their test environment)

funding.json

@@ -1,5 +1,5 @@
 {
   "opRetro": {
-    "projectId": "0x14c4932cb89f3c5ca4bb4b7e08f8ce1aa3be3ab6ff3983e13f305ebff55bd0a3"
+    "projectId": "0x8967594d2978692a35fea137ba640bb42f11cad907ca6b0bd01f3718fc4c7f5b"
   }
 }