doc: 'match aspath' should be 'match as-path'

doc/routemap.texi

@@ -143,7 +143,7 @@ Matches the specified @var{access_list}
 Matches the specified @var{ipv4_addr}.
 @end deffn
 
-@deffn {Route-map Command} {match aspath @var{as_path}} {}
+@deffn {Route-map Command} {match as-path @var{as_path}} {}
 Matches the specified @var{as_path}.
 @end deffn