Slash commands private beta (#17664)

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Co-authored-by: jmarlena <6732600+jmarlena@users.noreply.github.com>

Author: lecoursen

content/actions/reference/workflow-syntax-for-github-actions.md

@@ -17,7 +17,7 @@ versions:
 
 ### About YAML syntax for workflows
 
-Workflow files use YAML syntax, and must have either a `.yml` or `.yaml` file extension. If you're new to YAML and want to learn more, see "[Learn YAML in five minutes](https://www.codeproject.com/Articles/1214409/Learn-YAML-in-five-minutes)."
+Workflow files use YAML syntax, and must have either a `.yml` or `.yaml` file extension. {% data reusables.actions.learn-more-about-yaml %}
 
 You must store workflow files in the `.github/workflows` directory of your repository.
 

data/reusables/actions/learn-more-about-yaml.md

@@ -0,0 +1 @@
+If you're new to YAML and want to learn more, see "[Learn YAML in five minutes](https://www.codeproject.com/Articles/1214409/Learn-YAML-in-five-minutes)."