aucat.1: Improve description

[Josiah Frentsos]

Index: aucat.1
===================================================================
RCS file: /cvs/src/usr.bin/aucat/aucat.1,v
retrieving revision 1.117
diff -u -p -r1.117 aucat.1
--- aucat.1     7 Mar 2022 09:04:45 -0000       1.117
+++ aucat.1     13 Oct 2022 00:49:47 -0000
@@ -19,7 +19,7 @@
 .Os
 .Sh NAME
 .Nm aucat
-.Nd audio files manipulation tool
+.Nd manipulate audio files
 .Sh SYNOPSIS
 .Nm aucat
 .Op Fl dn