Update to landing page.

Author: RoseHJM

articles/deployment-environments/index.yml

@@ -69,6 +69,14 @@ landingContent:
           - text: Configure a project environment type
             url: how-to-configure-project-environment-types.md
 
+  # Card
+  - title: Manage costs
+    linkLists:
+      - linkListType: how-to-guide
+        links:
+          - text: Request a quota limit increase
+            url: how-to-request-quota-increase.md
+ 
   # Card
   - title: Configure Deployment Environments from the CLI
     linkLists: