chore: update Noble testnet endpoints and images (#688)

* chore: update Noble testnet endpoints and images

* chore: empty commit

cosmos/grand.json

@@ -1,12 +1,12 @@
 {
   "chainId": "grand-1",
   "chainName": "Grand",
-  "rpc": "https://rpc.testnet.noble.strange.love",
-  "rest": "https://api.testnet.noble.strange.love/",
+  "rpc": "https://noble-testnet-rpc.polkachu.com",
+  "rest": "https://noble-testnet-api.polkachu.com",
   "nodeProvider": {
-    "name": "Strangelove",
-    "email": "[email protected]",
-    "website": "https://strange.love/"
+    "name": "Polkachu",
+    "email": "[email protected]",
+    "website": "https://polkachu.com"
   },
   "chainSymbolImageUrl": "https://raw.githubusercontent.com/chainapsis/keplr-chain-registry/main/images/grand/chain.png",
   "stakeCurrency": {