tm: small spelling fix (bellow -> below)

src/modules/tm/t_cancel.c

@@ -173,7 +173,7 @@ int cancel_all_uacs(struct cell *trans, int how)
 }
 
 
-/* should be called directly only if one of the condition bellow is true:
+/* should be called directly only if one of the condition below is true:
  *  - prepare_cancel_branch or prepare_to_cancel returned true for this branch
  *  - buffer value was 0 and then set to BUSY in an atomic op.:
  *     if (atomic_cmpxchg_long(&buffer, 0, BUSY_BUFFER)==0).

src/modules/tm/t_reply.c

@@ -1417,7 +1417,7 @@ static enum rps t_should_relay_response( struct cell *Trans , int new_code,
 		/* look if the callback perhaps replied transaction; it also
 		 * covers the case in which a transaction is replied localy
 		 * on CANCEL -- then it would make no sense to proceed to
-		 * new branches bellow
+		 * new branches below
 		*/
 		if (Trans->uas.status >= 200) {
 			*should_store=0;