Bump Microsoft.VisualStudio.Threading from 17.10.48 to 17.11.20 #34789

Job	Run time
Build CLI (win-x64)	1m 38s
Build CLI (linux-x64)	1m 40s
Build CLI (linux-musl-x64)	1m 53s
Build CLI (osx-x64)	1m 49s
Build CLI (linux-arm64)	1m 39s
Build CLI (win-arm64)	1m 45s
Build CLI (osx-arm64)	2m 3s
Build NuGet Packages	44s
Build Highlight Libraries	4m 4s
Build Playground	3m 27s
Build: VSCode Extension	2m 52s
Build Visual Studio Extension	2m 14s
Check secret access	3s
Test Dotnet (windows-latest) (Core)	2m 23s
Test Dotnet (ubuntu-latest) (Core)	46s
Test Dotnet (windows-latest) (LangServer)	2m 17s
Test Dotnet (ubuntu-latest) (LangServer)	50s
Test Dotnet (windows-latest) (Others)	2m 26s
Test Dotnet (ubuntu-latest) (Others)	58s
Build CLI NuGet Packages (${{ matrix.rid }})	0s
Build Windows Setup	1m 8s
Test CLI (live) (win-x64) (prod)	10m 57s
Test CLI (e2e) (win-x64)	5m 7s
Test CLI (live) (linux-x64) (prod)	7m 20s
Test CLI (e2e) (linux-x64)	3m 38s
Test CLI (live) (osx-x64) (prod)	11m 8s
Test CLI (e2e) (linux-musl-x64)	1m 6s
Test CLI (live) (win-x64) (ff)	9m 9s
Test CLI (e2e) (osx-x64)	4m 12s
Test CLI (live) (linux-x64) (ff)	4m 35s
Test CLI (live) (osx-x64) (ff)	10m 6s
Test CLI (live) (linux-musl-x64) (prod)	1m 52s
Test CLI (live) (linux-musl-x64) (ff)	1m 43s
PR Comment: Dotnet Tests Summary	9s
Test: VSCode Bicep UI (windows-latest)	1m 18s
Test: VSCode Bicep UI (ubuntu-latest)	35s
Test: VSCode Bicep UI (macos-latest)	29s
PR Comment: Preview Links	4s
Test: VSCode Extension (windows-latest, true)	7m 43s
Test: VSCode Extension (ubuntu-latest, true)	4m 50s
	2h 2m 40s

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