[GitHub Actions] Update information about hosting MacOS Hosted runners (#16401)

* Update specifications-for-github-hosted-runners.md

* Update content/actions/reference/specifications-for-github-hosted-runners.md

Co-authored-by: Shati Patel <42641846+shati-patel@users.noreply.github.com>

Co-authored-by: Shati Patel <42641846+shati-patel@users.noreply.github.com>

Author: maxim-lobanov

content/actions/reference/specifications-for-github-hosted-runners.md

@@ -31,7 +31,7 @@ You can specify the runner type for each job in a workflow. Each job in a workfl
 
 {% data variables.product.prodname_dotcom %} hosts Linux and Windows runners on Standard_DS2_v2 virtual machines in Microsoft Azure with the {% data variables.product.prodname_actions %} runner application installed. The {% data variables.product.prodname_dotcom %}-hosted runner application is a fork of the Azure Pipelines Agent. Inbound ICMP packets are blocked for all Azure virtual machines, so ping or traceroute commands might not work. For more information about the Standard_DS2_v2 machine resources, see "[Dv2 and DSv2-series](https://docs.microsoft.com/azure/virtual-machines/dv2-dsv2-series#dsv2-series)" in the Microsoft Azure documentation.
 
-{% data variables.product.prodname_dotcom %} uses [MacStadium](https://www.macstadium.com/) to host the macOS runners.
+{% data variables.product.prodname_dotcom %} hosts macOS runners in {% data variables.product.prodname_dotcom %}'s own macOS Cloud.
 
 #### Administrative privileges of {% data variables.product.prodname_dotcom %}-hosted runners