docs: update kubernetes dind example

examples/kubernetes/dind-docker.yaml

@@ -1,4 +1,5 @@
 # Secret data.
+# You will need to retrive this from the web UI, and your Forgejo instance must be running v1.21+
 # Alternatively, create this with
 # kubectl create secret generic runner-secret --from-literal=token=your_offline_token_here
 apiVersion: v1
@@ -36,17 +37,21 @@ spec:
       # Initialise our configuration file using offline registration
       # https://forgejo.org/docs/v1.21/admin/actions/#offline-registration
       initContainers:
-      - name: runner-config-generation
-        image: code.forgejo.org/forgejo/runner:3.0.0
-        command: [ "forgejo-runner create-runner-file --instance $FORGEJO_INSTANCE_URL --secret $RUNNER_SECRET --connect" ]
+        - name: runner-register
+          image: code.forgejo.org/forgejo/runner:3.2.0
+          command: ["forgejo-runner", "register", "--no-interactive", "--token", $(RUNNER_SECRET), "--name", "runner", "--instance", $(FORGEJO_INSTANCE_URL)]
           env:
             - name: RUNNER_SECRET
               valueFrom:
                 secretKeyRef:
-              name: runner-secret
+                  name: forgejo-runner-secret
                   key: token
             - name: FORGEJO_INSTANCE_URL
-          value: http://gitea-http.gitea.svc.cluster.local:3000
+              value: http://forgejo-http.forgejo.svc.cluster.local:3000
+          resources:
+            limits:
+              cpu: "0.50"
+              memory: "64Mi"
           volumeMounts:
             - name: runner-data
               mountPath: /data