fix: Simplify act_runner config to match default structure and disable force_pull

k8s/gitea-runners/configmap.yaml

@@ -10,17 +10,10 @@ data:
     cache:
       enabled: false
     container:
-      require_docker: true
-      docker_timeout: 300s
-      network_mode: bridge
+      network: bridge
       privileged: false
       options:
         - "--privileged"
       docker_host: "tcp://localhost:2375"
-      docker_in_docker: true
-      registries:
-        docker.io:
-          username: ""
-          password: ""
-          use_http: false
+      force_pull: false