Update copy syntax to CommonMark compliant

data/reusables/actions/github_token-input-example.md

@@ -1,6 +1,6 @@
 This example workflow uses the [labeler action](https://github.com/actions/labeler), which requires the `GITHUB_TOKEN` as the value for the `repo-token` input parameter:
 
-```yaml{:copy}
+```yaml copy
 name: Pull request labeler
 on: [ pull_request_target ]