installation: fix codeblock rendering in zfs performance tips section

That slipped through, asciidoc uses 4 not 3 dashes for that.

Fixes: c8be3f0 ("installation: align zfs performance tip with PVE documentation")
Signed-off-by: Christoph Heiss <c.heiss@proxmox.com>

diff --git a/pmg-installation.adoc b/pmg-installation.adoc
index 326fe5be3fae97096fd8ab8c4328d3f3e4ea69f5..25d16a753744df44c50653b3381df64f654f2db5 100644 (file)
--- a/pmg-installation.adoc
+++ b/pmg-installation.adoc
@@ -284,9 +284,9 @@ ZFS can use a dedicated drive as write cache, called the ZFS Intent Log (ZIL).
 Use a fast drive (SSD) for it. It can be added after installation with the
 following command:
 
 Use a fast drive (SSD) for it. It can be added after installation with the
 following command:
 

----
+----

 # zpool add <pool-name> log </dev/path_to_fast_ssd>
 # zpool add <pool-name> log </dev/path_to_fast_ssd>

----
+----

 
 Adding the `nomodeset` Kernel Parameter
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Adding the `nomodeset` Kernel Parameter
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~