Switch charm to Bobcat

Switch charm to Bobcat release. Microk8s 1.28 will be the default
for Bobcat. Also ensure images are being collected from
ghcr.io/canonical

Change-Id: If574f807bdde197520111a8c475d5f1f96737c44

charms/horizon-k8s/.zuul.yaml

@@ -1,4 +1,4 @@
 - project:
     templates:
-      - openstack-python3-charm-yoga-jobs
+      - openstack-python3-charm-jobs
       - openstack-cover-jobs

charms/horizon-k8s/CONTRIBUTING.md

@@ -45,7 +45,7 @@ run:
 
 To deploy the local test instance:
 
-    juju deploy ./horizon-k8s_ubuntu-20.04-amd64.charm --trust --resource horizon-image=ghcr.io/canonical/horizon:2023.1
+    juju deploy ./horizon-k8s_ubuntu-20.04-amd64.charm --trust --resource horizon-image=ghcr.io/canonical/horizon:2023.2
 
 <!-- LINKS -->
 

charms/horizon-k8s/README.md

@@ -44,7 +44,7 @@ horizon-k8s requires the following relations:
 
 ## OCI Images
 
-The charm by default uses `ghcr.io/canonical/horizon:2023.1` image.
+The charm by default uses `ghcr.io/canonical/horizon:2023.2` image.
 
 ## Contributing
 

charms/horizon-k8s/metadata.yaml

@@ -26,8 +26,8 @@ resources:
   horizon-image:
     type: oci-image
     description: OCI image for Horizon 
-    # ghcr.io/canonical/horizon:2023.1
-    upstream-source: ghcr.io/canonical/horizon:2023.1
+    # ghcr.io/canonical/horizon:2023.2
+    upstream-source: ghcr.io/canonical/horizon:2023.2
 
 requires:
   database:

charms/horizon-k8s/osci.yaml

@@ -9,4 +9,4 @@
       build_type: charmcraft
       publish_charm: true
       charmcraft_channel: 2.0/stable
-      publish_channel: 2023.1/edge
+      publish_channel: 2023.2/edge