Bump arrstack image pins: radarr v6.4.2-unkin6, sonarr v5.0.0-unkin6

Ship ffprobe exec bit fix (radarr) and Commands-index migration (sonarr).

- Update radarr image tag v6.4.2-unkin5 → v6.4.2-unkin6 (ffprobe fix)
- Update sonarr image tag v5.0.0-unkin5 → v5.0.0-unkin6 (Commands-index)

apps/base/arrstack/radarr/deployment.yaml

@@ -71,7 +71,7 @@ spec:
               memory: 64Mi
       containers:
         - name: radarr
-          image: artifactapi.k8s.syd1.au.unkin.net/docker-internal/radarr:v6.4.2-unkin5
+          image: artifactapi.k8s.syd1.au.unkin.net/docker-internal/radarr:v6.4.2-unkin6
           imagePullPolicy: IfNotPresent
           command:
             - /app/Radarr

apps/base/arrstack/sonarr/deployment.yaml

@@ -71,7 +71,7 @@ spec:
               memory: 64Mi
       containers:
         - name: sonarr
-          image: artifactapi.k8s.syd1.au.unkin.net/docker-internal/sonarr:v5.0.0-unkin5
+          image: artifactapi.k8s.syd1.au.unkin.net/docker-internal/sonarr:v5.0.0-unkin6
           imagePullPolicy: IfNotPresent
           command:
             - /app/Sonarr