Move billing docs one level up and rename billing to subscription

Signed-off-by: Usha Mandya <usha.mandya@docker.com>

_data/toc.yaml

@@ -1398,24 +1398,24 @@ manuals:
        title: Convert an account into an organization
      - path: /docker-hub/deactivate-account/
        title: Deactivate an account or an organization
-  - sectiontitle: Billing
-    section:
-    - path: /docker-hub/billing/
-      title: Overview
-    - path: /docker-hub/billing/upgrade/
-      title: Upgrade your plan
-    - path: /docker-hub/billing/downgrade/
-      title: Downgrade your plan
-    - path: /docker-hub/billing/add-seats/
-      title: Add seats
-    - path: /docker-hub/billing/remove-seats/
-      title: Remove seats
-    - path: /docker-hub/billing/faq/
-      title: Pricing FAQs
   - path: /docker-hub/publish/
     title: Verified Publisher Program
   - path: /docker-hub/release-notes/
     title: Release notes
+- sectiontitle: Docker subscription
+  section:
+  - path: /docker-hub/billing/
+    title: Overview
+  - path: /docker-hub/billing/upgrade/
+    title: Upgrade your plan
+  - path: /docker-hub/billing/downgrade/
+    title: Downgrade your plan
+  - path: /docker-hub/billing/add-seats/
+    title: Add seats
+  - path: /docker-hub/billing/remove-seats/
+    title: Remove seats
+  - path: /docker-hub/billing/faq/
+    title: Pricing FAQs
 - sectiontitle: Open-source projects
   section:
   - sectiontitle: Docker Registry

docker-hub/billing/index.md

@@ -1,7 +1,7 @@
 ---
-description: Docker Billing overview
+description: Docker subscription overview
 keywords: Docker, pricing, billing, Pro, Team, subscription, plans,
-title: Docker Billing overview
+title: Docker subscription overview
 ---
 
 On May 14, 2020, Docker announced a new, per-seat pricing model that aligns with Docker’s [product strategy](https://www.docker.com/blog/docker-strategy-helping-devs-build-and-ship-faster/){: target="_blank" rel="noopener" class="_"} to accelerate developer workflows for cloud-native development. The previous private repository/parallel autobuild-based plans have been replaced with new **Pro** and **Team** subscriptions that include unlimited private repositories and up to 50,000 container pulls in a 24-hour period.

docker-hub/release-notes.md

@@ -67,7 +67,7 @@ Docker introduces Hub Vulnerability Scanning which enables you to automatically
 
 ### New features
 
-* Docker has announced a new, per-seat pricing model to accelerate developer workflows for cloud-native development. The previous private repository/parallel autobuild-based plans have been replaced with new **Pro** and **Team** plans that include unlimited private repositories. For more information, see [Docker Billing](../docker-hub/billing/index.md).
+* Docker has announced a new, per-seat pricing model to accelerate developer workflows for cloud-native development. The previous private repository/parallel autobuild-based plans have been replaced with new **Pro** and **Team** plans that include unlimited private repositories. For more information, see [Docker subscription](../docker-hub/billing/index.md).
 
 * Docker has enabled download rate limits for downloads and pull requests on Docker Hub. This caps the number of objects that users can download within a specified timeframe. For more information, see [Download rate limit](download-rate-limit.md).