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.

src/icons/fileIcons.ts

@@ -823,7 +823,7 @@ export const fileIcons: FileIcons = {
         { name: 'velocity', fileExtensions: ['vm', 'fhtml', 'vtl'] },
         { name: 'godot', fileExtensions: ['gd'] },
         { name: 'godot-assets', fileExtensions: ['godot', 'tres', 'tscn'] },
-        { name: 'azure-pipelines', fileNames: ['azure-pipelines.yml', 'azure-pipelines.yaml'] },
+        { name: 'azure-pipelines', fileNames: ['azure-pipelines.yml', 'azure-pipelines.yaml'], fileExtensions: ['azure-pipelines.yml', 'azure-pipelines.yaml'] },
         { name: 'azure', fileExtensions: ['azcli'] },
         { name: 'vagrant', fileNames: ['vagrantfile'], fileExtensions: ['vagrantfile'] },
         { name: 'prisma', fileNames: ['prisma.yml'], fileExtensions: ['prisma'] },