Set vcpkg binary caching

Author: florelis

azure-pipelines.yml

@@ -20,6 +20,7 @@ pool:
 variables:
   solution: 'src\AppInstallerCLI.sln'
   EnableDetectorVcpkg: true
+  VCPKG_BINARY_SOURCES: "clear;nuget,https://pkgs.dev.azure.com/shine-oss/winget-cli/_packaging/WinGetDependencies/nuget/v3/index.json,readwrite"
 
 # Do not set the build version for a PR build.