Update sourceIndexPackageVersion (dotnet#45982)

Author: wtgodbe

.azure/pipelines/ci.yml

@@ -87,7 +87,7 @@ variables:
            /p:DotNetPublishUsingPipelines=$(_PublishUsingPipelines)
   # Variables for source indexing afterBuild step and job.
   - name: sourceIndexPackageVersion
-    value: 1.0.1-20210614.1
+    value: 1.0.1-20221220.2
   - name: sourceIndexPackageSource
     value: https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json
   - group: source-dot-net stage1 variables