eth/protocols/snap: a little typo Merkel -> Merkle (#24530)

eth/protocols/snap/sync.go

@@ -168,7 +168,7 @@ type bytecodeResponse struct {
 // to actual requests and to validate any security constraints.
 //
 // Concurrency note: storage requests and responses are handled concurrently from
-// the main runloop to allow Merkel proof verifications on the peer's thread and
+// the main runloop to allow Merkle proof verifications on the peer's thread and
 // to drop on invalid response. The request struct must contain all the data to
 // construct the response without accessing runloop internals (i.e. tasks). That
 // is only included to allow the runloop to match a response to the task being