rescue: Fix typo in documentation of --network option.

diff --git a/tools/virt-rescue b/tools/virt-rescue
index 73fc568..809d52c 100755 (executable)
--- a/tools/virt-rescue
+++ b/tools/virt-rescue
@@ -172,7 +172,7 @@ parameter is specified in megabytes.
 
 my $network;
 
-=item B<--network MB>
+=item B<--network>
 
 Enable QEMU user networking in the guest.