chore: fix inconsistent method name in retryWithBackoffOnPayloadStatus comment (#2889)

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## Overview

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Corrected the comment for `retryWithBackoffOnPayloadStatus` function to
match the actual method name.

The comment previously referred to the function as "retryWithBackoff"
which was inconsistent with the actual function name
"retryWithBackoffOnPayloadStatus". This change ensures documentation
accuracy and code clarity.

Signed-off-by: bigmoonbit <bigmoonbit@outlook.com>

Author: bigmoonbit

execution/evm/execution.go

@@ -67,7 +67,7 @@ func validatePayloadStatus(status engine.PayloadStatusV1) error {
 	}
 }
 
-// retryWithBackoff executes a function with exponential backoff retry logic.
+// retryWithBackoffOnPayloadStatus executes a function with exponential backoff retry logic.
 // It implements the Engine API specification's recommendation to retry SYNCING
 // status with exponential backoff. The function:
 //   - Retries only on ErrPayloadSyncing (transient failures)