Publish multi-version documentation site (#1727)

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: bb4b44f0-f505-49c5-9878-76e2b40c7a15
Copilot-Session: 8eac1204-10ae-4319-9333-aee5dd43dcc8

docs/concepts/toc.yml

@@ -21,8 +21,6 @@ items:
     uid: progress
   - name: Cancellation
     uid: cancellation
-  - name: Tasks
-    uid: tasks
   - name: Multi Round-Trip Requests (MRTR)
     uid: mrtr
 - name: Client Features
@@ -55,5 +53,7 @@ items:
   items:
   - name: MCP Apps
     uid: apps
+  - name: Tasks
+    uid: tasks
   - name: Identity and Roles
     uid: identity