Change authors in 6-summary.yml

Updated author information in summary YAML file.

Author: rmcmurray

learn-pr/github/github-introduction-administration/6-summary.yml

@@ -5,8 +5,8 @@ metadata:
   title: Summary
   description: A recap on what you learned about GitHub administration in this module.
   ms.date: 09/20/2024
-  author: rmcmurray
-  ms.author: robmcm
+  author: lucie-docs
+  ms.author: aastewar
   ms.topic: unit
 durationInMinutes: 1
 content: |