Use https for sparse checkout command (Azure#21535)

Co-authored-by: Ben Broderick Phillips <bebroder@microsoft.com>

Author: azure-sdk

eng/common/pipelines/templates/steps/sparse-checkout.yml

@@ -38,8 +38,8 @@ steps:
             } else {
               Write-Host "Repository $($repository.Name) is being initialized."
 
-              Write-Host "git clone --no-checkout --filter=tree:0 git://github.com/$($repository.Name) ."
-              git clone --no-checkout --filter=tree:0 git://github.com/$($repository.Name) .
+              Write-Host "git clone --no-checkout --filter=tree:0 https://github.com/$($repository.Name) ."
+              git clone --no-checkout --filter=tree:0 https://github.com/$($repository.Name) .
 
               Write-Host "git sparse-checkout init"
               git sparse-checkout init