Update polygon testnet image

Author: ChaituVR

src/networks.json

@@ -1451,7 +1451,7 @@
       "url": "https://amoy.polygonscan.com/"
     },
     "start": 3127388,
-    "logo": "ipfs://https://snapshot.4everland.link/ipfs/bafkreibfiyvhqnme2vbxxfcku7qkxgjpkg6ywdkplxh4oxlkqsbznyorfm",
+    "logo": "ipfs://bafkreibfiyvhqnme2vbxxfcku7qkxgjpkg6ywdkplxh4oxlkqsbznyorfm",
     "testnet": true
   },
   "81457": {
@@ -1680,4 +1680,4 @@
     "start": 7521509,
     "logo": "ipfs://QmNnGPr1CNvj12SSGzKARtUHv9FyEfE5nES73U4vBWQSJL"
   }
-}
+}