grml2iso: update ISO filename in usage example

diff --git a/grml2iso b/grml2iso
index d8f4be5..ecf9c82 100755 (executable)
--- a/grml2iso
+++ b/grml2iso
@@ -66,7 +66,7 @@ Options:
                          during build. Defaults to /tmp/grml2iso.tmp if unset.
 
      Examples:
-     $0 -s http://192.168.23.42:8000/grml/ -o small.iso grml64_2010.12.iso
+     $0 -s http://192.168.23.42:8000/grml/ -o small.iso grml64-small_2018.12.iso 
 
      Will generate a file small.iso which tries to download the squashfs file from
      http://192.168.23.42:8000/grml/ - the squashfs file is placed in the same