Add some regular contributors to allow access to retry CI (PowerShell#10397)

Author: SteveL-MSFT

.poshchan/settings.json

@@ -16,14 +16,17 @@
         "authorized_users": [
             "adityapatwardhan",
             "anmenaga",
+            "bergmeister",
             "daxian-dbw",
             "iSazonov",
             "JamesWTruher",
+            "KirkMunro",
             "PaulHigin",
             "rjmholt",
             "SteveL-MSFT",
             "TravisEz13",
-            "TylerLeonhardt"
+            "TylerLeonhardt",
+            "vexx32"
         ]
     },
     "failures": {