Fix image tags that failed to pull on test-cloud

- discourse: 2026.10.0 -> 2026.10.0-latest (correct tag format)
- formbricks: Docker Hub 6.1.0 -> ghcr.io 4.6.0 (moved to GHCR)
- zulip: Docker Hub 12.3-0 -> ghcr.io 12.3-0 (12.x on GHCR)
- open-webui: v0.12.3 -> v0.12.4 (newer release)

discourse/versions/2026/deployment.yaml

@@ -23,7 +23,7 @@ spec:
         fsGroupChangePolicy: Always
       initContainers:
         - name: discourse-migrate
-          image: discourse/discourse:2026.10.0
+          image: discourse/discourse:2026.10.0-latest
           imagePullPolicy: "IfNotPresent"
           securityContext:
             allowPrivilegeEscalation: false
@@ -87,7 +87,7 @@ spec:
               mountPath: /shared
       containers:
         - name: discourse
-          image: discourse/discourse:2026.10.0
+          image: discourse/discourse:2026.10.0-latest
           imagePullPolicy: "IfNotPresent"
           command:
             - /sbin/boot
@@ -192,7 +192,7 @@ spec:
             - name: discourse-data
               mountPath: /shared
         - name: sidekiq
-          image: discourse/discourse:2026.10.0
+          image: discourse/discourse:2026.10.0-latest
           imagePullPolicy: "IfNotPresent"
           securityContext:
             allowPrivilegeEscalation: false

formbricks/versions/6/deployment.yaml

@@ -22,7 +22,7 @@ spec:
           type: RuntimeDefault
       containers:
         - name: formbricks
-          image: formbricks/formbricks:6.1.0
+          image: ghcr.io/formbricks/formbricks:4.6.0
           ports:
             - name: http
               containerPort: 3000

formbricks/versions/6/manifest.yaml

@@ -1,4 +1,4 @@
-version: 6.1.0
+version: 4.6.0
 requires:
 - name: postgres
 - name: redis

open-webui/versions/0/deployment.yaml

@@ -19,7 +19,7 @@ spec:
           type: RuntimeDefault
       containers:
       - name: open-webui
-        image: ghcr.io/open-webui/open-webui:v0.12.3
+        image: ghcr.io/open-webui/open-webui:v0.12.4
         imagePullPolicy: IfNotPresent
         securityContext:
           allowPrivilegeEscalation: false

open-webui/versions/0/manifest.yaml

@@ -1,4 +1,4 @@
-version: 0.12.3
+version: 0.12.4
 defaultConfig:
   namespace: open-webui
   storage: 2Gi

zulip/versions/12/deployment.yaml

@@ -22,7 +22,7 @@ spec:
           type: RuntimeDefault
       containers:
         - name: zulip
-          image: zulip/docker-zulip:12.3-0
+          image: ghcr.io/zulip/zulip-server:12.3-0
           ports:
             - name: http
               containerPort: 80