Add BuildNumber to SiteExtension build

Author: BrennanConroy

src/SiteExtensions/LoggingAggregate/src/Microsoft.AspNetCore.AzureAppServices.SiteExtension/Microsoft.AspNetCore.AzureAppServices.SiteExtension.csproj

@@ -27,8 +27,8 @@
     <Reference Include="Microsoft.AspNetCore.AzureAppServices.SiteExtension.2.1" Version="$(MicrosoftAspNetCoreAzureAppServicesSiteExtension21PackageVersion)" PrivateAssets="All" />
     <Reference Include="Microsoft.AspNetCore.AzureAppServices.SiteExtension.2.2" Version="$(MicrosoftAspNetCoreAzureAppServicesSiteExtension22PackageVersion)" PrivateAssets="All" />
     <!-- When updating this add the previous SiteExtension(s) to the list above -->
-    <PackageReference Include="Microsoft.AspNetCore.AzureAppServices.SiteExtension.3.1.x64" Version="$(PackageVersion)-$(_PreReleaseLabel)" PrivateAssets="All" />
-    <PackageReference Include="Microsoft.AspNetCore.AzureAppServices.SiteExtension.3.1.x86" Version="$(PackageVersion)-$(_PreReleaseLabel)" PrivateAssets="All" />
+    <PackageReference Include="Microsoft.AspNetCore.AzureAppServices.SiteExtension.3.1.x64" Version="$(PackageVersion)-$(_PreReleaseLabel)$(_BuildNumberLabels)" PrivateAssets="All" />
+    <PackageReference Include="Microsoft.AspNetCore.AzureAppServices.SiteExtension.3.1.x86" Version="$(PackageVersion)-$(_PreReleaseLabel)$(_BuildNumberLabels)" PrivateAssets="All" />
   </ItemGroup>
 
   <ItemGroup>