Bug 1841: LTS Support K8s upgrade

This fix changes the K8s version to 1.23 in installation scripts.

Change-Id: Id020ece215f62ac9633a5190392350dbb8da515a
Signed-off-by: aticig <gulsum.atici@canonical.com>
diff --git a/installers/charmed_install.sh b/installers/charmed_install.sh
index 0f895cd..82c70b1 100755
--- a/installers/charmed_install.sh
+++ b/installers/charmed_install.sh
@@ -17,10 +17,10 @@
 
 LXD_VERSION=4.0
 JUJU_VERSION=2.9
-JUJU_AGENT_VERSION=2.9.17
+JUJU_AGENT_VERSION=2.9.22
 K8S_CLOUD_NAME="k8s-cloud"
 KUBECTL="microk8s.kubectl"
-MICROK8S_VERSION=1.20
+MICROK8S_VERSION=1.23
 OSMCLIENT_VERSION=10.0
 IMAGES_OVERLAY_FILE=~/.osm/images-overlay.yaml
 PATH=/snap/bin:${PATH}