Pass feedBaseUrl to NPM release template for internal feed publish (#375)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: bwateratmsft

.config/release.yml

@@ -51,3 +51,4 @@ extends:
     approverAliases: ${{ variables.npmReleaseApproverAliases }}
     gitHubServiceConnection: ${{ variables.gitHubServiceConnection }}
     releaseApprovalEnvironment: VSCodeDockerExtensionPublish
+    feedBaseUrl: ${{ variables.feedBaseUrl }}