Fixing bug in az fleet namespace get-credentials command (#9383)

* updates

* updates

Author: audrastump

src/fleet/HISTORY.rst

@@ -164,4 +164,8 @@ Release History
 
 1.8.1
 ++++++
-* Ensure role assignment is created for private fleets before fleet creation.
+* Ensure role assignment is created for private fleets before fleet creation.
+
+1.8.2
+++++++
+* Fix fleet namespace get-credentials command with fleet member parameter.

src/fleet/azext_fleet/custom.py

@@ -237,8 +237,8 @@ def get_credentials(cmd,
             fleet_member = fleet_members_client.get(resource_group_name, name, member_name)
 
             parsed_id = parse_resource_id(fleet_member.cluster_resource_id)
-            if (parsed_id.get('resource_type') != 'managedClusters' or
-                    parsed_id.get('namespace') != 'Microsoft.ContainerService'):
+            if (parsed_id.get('resource_type').lower() != 'managedclusters' or
+                    parsed_id.get('namespace').lower() != 'microsoft.containerservice'):
                 raise CLIError(f"Fleet member '{member_name}' is not associated with an AKS managed cluster. "
                                f"Currently, only AKS managed clusters are supported for this command.")