Clarify Azure VNET private networking requires larger runners (#62789)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: felickz <1760475+felickz@users.noreply.github.com>

Author: Copilot

data/reusables/actions/azure-vnet-about-larger-runners.md

@@ -1,3 +1,3 @@
-2-64 vCPU Ubuntu and Windows runners are supported with Azure VNET. For more information on these runner types, see [AUTOTITLE](/actions/reference/runners/larger-runners#specifications-for-general-larger-runners).
+Azure VNET private networking is only available for larger runners (2-64 vCPU Ubuntu and Windows). Standard {% data variables.product.company_short %}-hosted runners are not supported. For more information on larger runner types, see [AUTOTITLE](/actions/reference/runners/larger-runners#specifications-for-general-larger-runners).
 
 {% data reusables.actions.static-ip-limitation-vnet %} You must use dynamic IP addresses, which is the default configuration for larger runners. For more information about networking for larger runners, see [AUTOTITLE](/actions/reference/runners/larger-runners#networking-for-larger-runners).