Reorder Copilot SDK table of contents (#62327)

Co-authored-by: hubwriter <hubwriter@github.com>
Copilot-Session: 213ac325-6788-4442-92e3-47da4aaaf114

Author: scottaddie

content/copilot/how-tos/copilot-sdk/index.md

@@ -9,9 +9,9 @@ versions:
   ghec: '*'
 contentType: how-tos
 children:
+  - /getting-started
   - /auth
   - /features
-  - /getting-started
   - /hooks
   - /integrations
   - /observability
@@ -22,4 +22,3 @@ children:
 <!-- markdownlint-disable GHD046 GHD005 -->
 <!-- Suppressed: GHD046 (outdated release terminology), GHD005 (hardcoded data variable) -->
 
-