Reorder Concepts TOC. (#3805)

_data/concepts.yml

@@ -47,6 +47,28 @@ toc:
     - docs/concepts/workloads/controllers/jobs-run-to-completion.md
     - docs/concepts/workloads/controllers/cron-jobs.md
 
+- title: Configuration
+  section:
+  - docs/concepts/configuration/overview.md
+  - docs/concepts/configuration/manage-compute-resources-container.md
+  - docs/concepts/configuration/assign-pod-node.md
+  - docs/concepts/configuration/secret.md
+
+- title: Services, Load Balancing, and Networking
+  section:
+  - docs/concepts/services-networking/service.md
+  - docs/concepts/services-networking/dns-pod-service.md
+  - docs/concepts/services-networking/connect-applications-service.md
+  - docs/concepts/services-networking/ingress.md
+  - docs/concepts/services-networking/networkpolicies.md
+
+- title: Storage
+  section:
+  - docs/concepts/storage/volumes.md
+  - docs/concepts/storage/persistent-volumes.md
+  - title: Dynamic Provisioning
+    path: http://blog.kubernetes.io/2016/10/dynamic-provisioning-and-storage-in-kubernetes.html
+
 - title: Cluster Administration
   section:
   - docs/concepts/cluster-administration/cluster-administration-overview.md
@@ -60,36 +82,11 @@ toc:
   - docs/concepts/cluster-administration/authenticate-across-clusters-kubeconfig.md
   - docs/concepts/cluster-administration/master-node-communication.md
   - docs/concepts/cluster-administration/proxies.md
+  - title: Policies
+    section:
+    - docs/concepts/policy/container-capabilities.md
+    - docs/concepts/policy/resource-quotas.md
+    - docs/concepts/policy/security-context.md
+    - docs/concepts/policy/pod-security-policy.md
 
-- title: Storage
-  section:
-  - docs/concepts/storage/volumes.md
-  - docs/concepts/storage/persistent-volumes.md
-  - title: Dynamic Provisioning
-    path: http://blog.kubernetes.io/2016/10/dynamic-provisioning-and-storage-in-kubernetes.html
-
-- title: Services, Load Balancing, and Networking
-  section:
-  - docs/concepts/services-networking/service.md
-  - docs/concepts/services-networking/dns-pod-service.md
-  - docs/concepts/services-networking/connect-applications-service.md
-  - docs/concepts/services-networking/ingress.md
-  - docs/concepts/services-networking/networkpolicies.md
-
-- title: Configuration
-  section:
-  - docs/concepts/configuration/overview.md
-  - docs/concepts/configuration/manage-compute-resources-container.md
-  - docs/concepts/configuration/assign-pod-node.md
-  - docs/concepts/configuration/secret.md
-
-- title: Policies
-  section:
-  - docs/concepts/policy/container-capabilities.md
-  - docs/concepts/policy/resource-quotas.md
-  - docs/concepts/policy/security-context.md
-  - docs/concepts/policy/pod-security-policy.md
-
-- title: Ecosystem
-  section: