New Azure private networking region availability (#50436)

Co-authored-by: Siara <108543037+SiaraMist@users.noreply.github.com>

data/reusables/actions/azure-vnet-supported-regions.md

@@ -1,16 +1,24 @@
 The {% data variables.product.prodname_actions %} service supports a subset of all the regions that Azure provides. To facilitate communication between the {% data variables.product.prodname_actions %} service and your subnet, your subnet must be in one of the following supported regions.
 
-- `EastUs`
-- `EastUs2`
-- `WestUs2`
-- `AustraliaEast`
-- `CentralUs`
-- `FranceCentral`
-- `NorthEurope`
-- `NorwayEast`
-- `SoutheastAsia`
-- `SwitzerlandNorth`
-- `UkSouth`
+<ul style="-webkit-column-count: 2; -moz-column-count: 2; column-count: 2;">
+<li><code>EastUs</code></li>
+<li><code>EastUs2</code></li>
+<li><code>WestUs2</code></li>
+<li><code>WestUs3</code></li>
+<li><code>CentralUs</code></li>
+<li><code>NorthCentralUs</code></li>
+<li><code>SouthCentralUs</code></li>
+<li><code>AustraliaEast</code></li>
+<li><code>JapanEast</code></li>
+<li><code>FranceCentral</code></li>
+<li><code>GermanyWestCentral</code></li>
+<li><code>NorthEurope</code></li>
+<li><code>NorwayEast</code></li>
+<li><code>SwedenCentral</code></li>
+<li><code>SwitzerlandNorth</code></li>
+<li><code>UkSouth</code></li>
+<li><code>SoutheastAsia</code></li>
+</ul>
 
 Azure private networking supports GPU runners in the following regions.
 
@@ -19,4 +27,4 @@ Azure private networking supports GPU runners in the following regions.
 - `NorthCentralUs`
 - `SouthCentralUs`
 
-You may also use global virtual network peering to connect virtual networks across Azure regions. For more information, see [Virtual network peering](https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-peering-overview) in the Azure documentation.
+If your desired region is not supported, please submit a request for new region availability in [this GitHub form](https://resources.github.com/private-networking-for-github-hosted-runners-with-azure-virtual-networks/). You may also use global virtual network peering to connect virtual networks across Azure regions. For more information, see [Virtual network peering](https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-peering-overview) in the Azure documentation.