Update description to include "rollback" keyword.

This is the keyword that I assume most people use when looking for this
sort of a tool. Should be helpful.

Signed-off-by: Nicolás Ortega Froysa <nicolas@ortegas.org>

pacundo.1

@@ -1,6 +1,6 @@
 .TH PACUNDO "1" "April 2024" "pacundo 1.0.1" "User Commands"
 .SH "NAME"
-pacundo - A time machine to return your ArchLinux machine back to a working state.
+pacundo - A time machine to roll back your ArchLinux machine to a working state.
 .SH "SYNOPSIS"
 .B pacundo
 [\fI\-i\fR|\fI\-r\fR] [\fI\-t\fR <\fInum\fR>] [\fI\-d\fR]

pacundo.pl

@@ -39,7 +39,7 @@ sub print_version() {
 
 sub print_help() {
 	&print_version();
-	print("A time machine to return your ArchLinux machine back to a working state.
+	print("A time machine to roll back your ArchLinux machine to a working state.
 
 USAGE:
 	$PROG_NAME [-i|-r] [-t <num>] [-d]