feat: update testnet MF validators (#675)

Author: johnmarcou

testnet/020ac9421d8857c162e33b6c11b9283f7e283d6896e847173943d79123c50a3aff.json

@@ -0,0 +1,10 @@
+{
+  "id": 1,
+  "name": "Monad Foundation",
+  "secp": "025f90fdc4f1ebe1a8939578d7f1ce53ecda08b18dda80aea9abe1e6a4546c3242",
+  "bls": "80360e0662cdaeff22e4490e892e9496b259263cfea10c4872b9613d745da745e676b06959b756bba80bd97ce845992a",
+  "website": "https://www.monad.foundation/",
+  "description": "Monad Foundation",
+  "logo": "https://bucket.monadinfra.com/monad.png",
+  "x": "https://x.com/monad_xyz"
+}