Revert group change

Author: Gijsreyn

dsc/examples/groups.dsc.yaml

@@ -2,7 +2,7 @@
 $schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
 metadata:
   Microsoft.DSC:
-    securityContext: current # this is the default and just used as an example indicating this config works for admins and non-admins
+    requiredSecurityContext: current # this is the default and just used as an example indicating this config works for admins and non-admins
 resources:
 - name: Last Group
   type: Microsoft.DSC/Group
@@ -38,4 +38,4 @@ resources:
         - name: Nested First
           type: Microsoft.DSC.Debug/Echo
           properties:
-            output: Nested First
+            output: Nested First