updated solana-plugin readme

Author: sunsakis

packages/plugin-solana/README.MD

@@ -141,13 +141,25 @@ Transfers tokens between wallets.
 
 ```typescript
 // Example usage
-const result = await runtime.executeAction("TRANSFER_TOKEN", {
+const result = await runtime.executeAction("SEND_TOKEN", {
     tokenAddress: "TokenAddressHere",
     recipient: "RecipientAddressHere",
     amount: "1000",
 });
 ```
 
+### transferSol
+
+Transfers SOL between wallets.
+
+```typescript
+// Example usage
+const result = await runtime.executeAction("SEND_SOL", {
+    recipient: "RecipientAddressHere",
+    amount: "1000",
+});
+```
+
 ### takeOrder
 
 Places a buy order based on conviction level.