Make 18.0 a promotable channel

Author: kartheekp-ms

src/Microsoft.DotNet.Build.Tasks.Feed/src/model/PublishingConstants.cs

@@ -1539,6 +1539,17 @@ public enum BuildQuality
                 targetFeeds: DotNetToolsFeeds,
                 symbolTargetType: SymbolPublishVisibility.Public,
                 flatten: false),
+            // VS 18.0
+            new TargetChannelConfig(
+                id: 7987,
+                isInternal: false,
+                publishingInfraVersion: PublishingInfraVersion.Latest,
+                akaMSChannelNames: [],
+                akaMSCreateLinkPatterns: DefaultAkaMSCreateLinkPatterns,
+                akaMSDoNotCreateLinkPatterns: DefaultAkaMSDoNotCreateLinkPatterns,
+                targetFeeds: DotNetToolsFeeds,
+                symbolTargetType: SymbolPublishVisibility.Public,
+                flatten: false),
         };
         #endregion
     }