Update TOC.yml

Add new resource graph sample queries doc to TOC

Author: kellydevens

articles/orbital/TOC.yml

@@ -38,6 +38,8 @@ items:
     href: modem-chain.md 
   - name: Receive real-time telemetry
     href: receive-real-time-telemetry.md
+  - name: Azure Resource Graph Queries
+    href: resource-graph-samples.md
   - name: Update the spacecraft TLE
     href: update-tle.md
   - name: Cancel a contact