Update global author, ms.author, and manager

ms.author and manager are now FEDS SharePoint Admin Team (speedta). The value of author must be for an individual GitHub account, so I've selected Sam Kabue.

Author: garycentric

sharepoint/docfx.json

@@ -43,9 +43,9 @@
       "breadcrumb_path": "/powershell/breadcrumb/toc.json",
       "feedback_system": "Standard",
             "feedback_product_url": "https://github.com/MicrosoftDocs/OfficeDocs-SharePoint-powershell/issues",
-      "author": "techwriter40",
-      "manager": "meerak",
-      "ms.author": "pamgreen",
+      "author": "samkabue",
+      "manager": "speedta",
+      "ms.author": "speedta",
       "ms.devlang": "powershell",
       "ms.topic": "reference",
       "contributors_to_exclude": [