fix(ubuntu): this sed fails on u20 and u22, so make it succeed

Signed-off-by: Douglas J Hunley <[email protected]>

Author: hunleyd

packer_templates/http/ubuntu/user-data

@@ -13,9 +13,10 @@ autoinstall:
     install-server: yes
     allow-pw: yes
   late-commands:
+    # add || true until we stop building u20/22
     - |
       if [ -f /target/etc/netplan/00-installer-config.yaml ]; then
-        'sed -i "s/dhcp4: true/&\n      dhcp-identifier: mac/" /target/etc/netplan/00-installer-config.yaml'
+        'sed -i "s/dhcp4: true/&\n      dhcp-identifier: mac/" /target/etc/netplan/00-installer-config.yaml' || true
       fi
     - echo 'vagrant ALL=(ALL) NOPASSWD:ALL' > /target/etc/sudoers.d/vagrant
     # Enable hyper-v daemons only if using hyper-v virtualization