docs(cost-management): align dynamic-plugin.md with verified deployment config

Update the ConfigMap example to exactly match the working configuration
deployed on ocp-edge73: icon reference name costManagementIcon and
dot-separated menuItems keys (cost-management.optimizations).

Made-with: Cursor

Author: hardengl

workspaces/cost-management/docs/dynamic-plugin.md

@@ -40,30 +40,30 @@ The procedure involves the following steps:
          frontend:
            red-hat-developer-hub.plugin-cost-management:
              appIcons:
-               - name: costManagementIconOutlined
+               - name: costManagementIcon
                  importName: CostManagementIconOutlined
              dynamicRoutes:
                - path: /cost-management/optimizations
                  importName: ResourceOptimizationPage
                  menuItem:
-                   icon: costManagementIconOutlined
+                   icon: costManagementIcon
                    text: Optimizations
                - path: /cost-management/openshift
                  importName: OpenShiftPage
                  menuItem:
-                   icon: costManagementIconOutlined
+                   icon: costManagementIcon
                    text: OpenShift
              menuItems:
-               cost-management/optimizations:
+               cost-management:
+                 icon: costManagementIcon
+                 title: Cost management
+                 priority: 100
+               cost-management.optimizations:
                  parent: cost-management
                  priority: 10
-               cost-management/openshift:
+               cost-management.openshift:
                  parent: cost-management
                  priority: 20
-               cost-management:
-                 icon: costManagementIconOutlined
-                 title: Cost management
-                 priority: 100
    - package: oci://quay.io/redhat-resource-optimization/dynamic-plugins:latest!red-hat-developer-hub-plugin-cost-management-backend
      disabled: false
      pluginConfig: