fix(bookstack): point probes at /status instead of / (DEV-528)

BookStack's `/` returns 302 → /login, which caused Kubernetes to
raise ProbeWarning events on the readiness (and liveness) probes.
`/status` is BookStack's built-in monitoring endpoint: it returns
200 without a redirect and is designed for health checks.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/bookstack/bookstack-deployment.yaml

@@ -200,7 +200,7 @@ spec:
             cpu: "1000m"
         livenessProbe:
           httpGet:
-            path: /
+            path: /status
             port: 80
           initialDelaySeconds: 60
           periodSeconds: 10
@@ -208,7 +208,7 @@ spec:
           failureThreshold: 6
         readinessProbe:
           httpGet:
-            path: /
+            path: /status
             port: 80
           initialDelaySeconds: 30
           periodSeconds: 5