chore: switch rpc url arbitrum (#12314)

Author: grandizzy

crates/test-utils/src/rpc.rs

@@ -187,6 +187,10 @@ fn next_url_inner(is_ws: bool, chain: NamedChain) -> String {
         return "https://celo.drpc.org".to_string();
     }
 
+    if matches!(chain, Arbitrum) {
+        return "https://arb1.arbitrum.io/rpc".to_string();
+    }
+
     let reth_works = true;
     let domain = if reth_works && matches!(chain, Mainnet) {
         *(if is_ws { &WS_DOMAINS } else { &HTTP_DOMAINS }).next()
@@ -195,7 +199,6 @@ fn next_url_inner(is_ws: bool, chain: NamedChain) -> String {
         let key = DRPC_KEYS.next();
         let network = match chain {
             Mainnet => "ethereum",
-            Arbitrum => "arbitrum",
             Polygon => "polygon",
             Sepolia => "sepolia",
             _ => "",