update comment

frame/examples/offchain-worker/src/lib.rs

@@ -410,8 +410,7 @@ impl<T: Config> Pallet<T> {
 		match res {
 			// The value has been set correctly, which means we can safely send a transaction now.
 			Ok(block_number) => {
-				// Depending if the block is even or odd we will send a `Signed` or `Unsigned`
-				// transaction.
+				// We will send different transactions based on a random number.
 				// Note that this logic doesn't really guarantee that the transactions will be sent
 				// in an alternating fashion (i.e. fairly distributed). Depending on the execution
 				// order and lock acquisition, we may end up for instance sending two `Signed`