Reorder SSH step

This reduces the number of steps in the "First Boot" section that are
not related to the first boot.

Reported-by: Jonathan Dumont <JOduMonT>
Signed-off-by: Richard Laager <rlaager@wiktel.com>

docs/Getting Started/Debian/Debian Buster Root on ZFS.rst

@@ -741,6 +741,13 @@ Step 4: System Configuration
      cp /usr/share/systemd/tmp.mount /etc/systemd/system/
      systemctl enable tmp.mount
 
+#. Optional: Install SSH::
+
+     apt install --yes openssh-server
+
+     vi /etc/ssh/sshd_config
+     # Set: PermitRootLogin yes
+
 #. Optional (but kindly requested): Install popcon
 
    The ``popularity-contest`` package reports the list of packages install
@@ -850,13 +857,6 @@ Step 5: GRUB Installation
 Step 6: First Boot
 ------------------
 
-#. Optional: Install SSH::
-
-     apt install --yes openssh-server
-
-     vi /etc/ssh/sshd_config
-     # Set: PermitRootLogin yes
-
 #. Optional: Snapshot the initial installation::
 
      zfs snapshot bpool/BOOT/debian@install

docs/Getting Started/Ubuntu/Ubuntu 20.04 Root on ZFS.rst

@@ -920,6 +920,13 @@ Step 4: System Configuration
    zfs root
    <https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1875577>`__.
 
+#. Optional: Install SSH::
+
+     apt install --yes openssh-server
+
+     vi /etc/ssh/sshd_config
+     # Set: PermitRootLogin yes
+
 Step 5: GRUB Installation
 -------------------------
 
@@ -1035,16 +1042,6 @@ Step 5: GRUB Installation
 
      sed -Ei "s|/mnt/?|/|" /etc/zfs/zfs-list.cache/*
 
-Step 6: First Boot
-------------------
-
-#. Optional: Install SSH::
-
-     apt install --yes openssh-server
-
-     vi /etc/ssh/sshd_config
-     # Set: PermitRootLogin yes
-
 #. Exit from the ``chroot`` environment back to the LiveCD environment::
 
      exit
@@ -1062,6 +1059,9 @@ Step 6: First Boot
 
    Wait for the newly installed system to boot normally. Login as root.
 
+Step 6: First Boot
+------------------
+
 #. Install GRUB to additional disks:
 
    For a UEFI mirror or raidz topology only::