fix: added definitions

Author: Etschbacher

examples/enhanced_websocket_transactions.rs

@@ -12,9 +12,9 @@ async fn main() -> Result<()> {
     // Uses custom ping-pong timeouts to ping every 15s and timeout after 45s of no pong
     let helius: Helius = Helius::new_with_ws_with_timeouts(api_key, cluster, Some(15), Some(45)).await?;
 
-    let key = pubkey!("BtsmiEEvnSuUnKxqXj2PZRYpPJAc7C34mGz8gtJ1DAaH");
+    let key: pubkey::Pubkey = pubkey!("BtsmiEEvnSuUnKxqXj2PZRYpPJAc7C34mGz8gtJ1DAaH");
 
-    let config = RpcTransactionsConfig {
+    let config: RpcTransactionsConfig = RpcTransactionsConfig {
         filter: TransactionSubscribeFilter {
             account_include: Some(vec![key.to_string()]),
             vote: Some(false),