update kubernetes example

Author: miparnisari

README.md

@@ -17,6 +17,7 @@ Developers create a schema that models their permissions requirements and use a
 Examples in this repository include:
 
 - How to set up SpiceDB with tracing: see [tracing](./tracing)
+- How to run SpiceDB in a Kubernetes cluster: see [kubernetes](./kubernetes)
 - CI/CD Workflows
 
 Have questions? Join our [Discord].

kubernetes/example.yaml

@@ -143,9 +143,9 @@ spec:
             - name: "prometheus"
               containerPort: 9090
               protocol: "TCP"
-          readinessProbe:
-            exec:
-              command: ["grpc_health_probe", "-v", "-addr=localhost:50051"]
+          livenessProbe:
+            grpc:
+              port: 50051
             failureThreshold: 5
             periodSeconds: 10
             successThreshold: 1