chore: update FUNDING.json

I've added addresses to receive Drips donations. This is required for FIL-RetroPGF-2 in the coming days, we should get this into `master` ASAP.

This is a dedicated address controlled by Sigma Prime (including @AgeManning and myself).

Pull-Request: #5685.

FUNDING.json

@@ -1,5 +1,13 @@
 {
-  "opRetro": {
-    "projectId": "0xdf1bb03d08808e2d789f5eac8462bdc560f1bb5b0877f0cf8c66ab53a0bc2f5c"
-  }
+    "drips": {
+        "ethereum": {
+            "ownedBy": "0x79c49637182Ea32734f7e8445a3649c22ff348f2"
+        },
+        "filecoin": {
+            "ownedBy": "0x79c49637182Ea32734f7e8445a3649c22ff348f2"
+        }
+    },
+    "opRetro": {
+        "projectId": "0xdf1bb03d08808e2d789f5eac8462bdc560f1bb5b0877f0cf8c66ab53a0bc2f5c"
+    }
 }