eth/fetcher: fix annotation (#16969)

eth/fetcher/fetcher.go

@@ -88,7 +88,7 @@ type headerFilterTask struct {
 	time    time.Time       // Arrival time of the headers
 }
 
-// headerFilterTask represents a batch of block bodies (transactions and uncles)
+// bodyFilterTask represents a batch of block bodies (transactions and uncles)
 // needing fetcher filtering.
 type bodyFilterTask struct {
 	peer         string                 // The source peer of block bodies