Add azure-pipeline icon to files ending with *.azure-pipelines.yaml
Add azure-pipeline icon to files ending with *.azure-pipelines.yaml

Some users might have multiple pipeline definitions in their projects. I often see users (including myself) naming them `dev.azure-pipelines.yaml`, `staging.azure-pipelines.yaml` and so on. This change would allow users to do that and still see the azure-pipeline icon.
PKief/vscode-material-icon-theme,ycrepeau/vscode-material-icon-theme,PKief/vscode-material-icon-theme