feat(less): add new ignored flag -K

Signed-off-by: benja2998 <benja2998@duck.com>

Author: benja2998

miscutils/less.c

@@ -1913,7 +1913,7 @@ int less_main(int argc, char **argv)
 	getopt32(argv, "EMmN~IF"
 		IF_FEATURE_LESS_TRUNCATE("S")
 		IF_FEATURE_LESS_RAW("R")
-		/*ignored:*/"sX"
+		/*ignored:*/"sXK"
 	);
 	argv += optind;
 	num_files = argc - optind;