Remove GitHub link

Author: sethmanheim

AKS-Arc/TOC.yml

@@ -272,8 +272,6 @@
       href: aks-edge-troubleshoot-overview.md
     - name: Logs 
       href: aks-edge-resources-logs.md
-    - name: Release notes and known issues
-      href: https://github.com/Azure/AKS-Edge/releases
     - name: File bugs
       href: https://github.com/Azure/AKS-Edge/issues
     - name: AKS Edge Essentials pricing