Update the VisualStudio.ChannelName for release branch (#11304)

Author: JaynieBai

.vsts-dotnet.yml

@@ -115,7 +115,7 @@ extends:
         - name: VisualStudio.MajorVersion
           value: 17
         - name: VisualStudio.ChannelName
-          value: 'int.main'
+          value: 'int.d17.12' # MSBuild's vs17.12 branch corresponds to this VS channel
         - name: VisualStudio.DropName
           value: Products/$(System.TeamProject)/$(Build.Repository.Name)/$(Build.SourceBranchName)/$(Build.BuildNumber)
 

eng/Versions.props

@@ -2,7 +2,7 @@
 <!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the MIT license. See License.txt in the project root for full license information. -->
 <Project>
   <PropertyGroup>
-    <VersionPrefix>17.12.24</VersionPrefix>
+    <VersionPrefix>17.12.25</VersionPrefix>
     <DotNetFinalVersionKind>release</DotNetFinalVersionKind>
     <PackageValidationBaselineVersion>17.11.4</PackageValidationBaselineVersion>
     <AssemblyVersion>15.1.0.0</AssemblyVersion>