Add PowerShell command example for Wikis

To update the documentation which should explicitly mention that:

PowerShell parses special characters before passing them to the Azure CLI

JMESPath queries must be wrapped in single quotes when running commands in PowerShell

Author: v-soujanya

azure-devops/azext_devops/dev/team/_help.py

@@ -150,6 +150,10 @@ def load_team_help():
         - name: Discover areas related to 'Wiki'
           text: |
             az devops invoke --query "[?contains(area,'wiki')]"
+            
+        - name: PowerShell Command to Get all Wikis
+          text: |
+            az devops invoke --query '[?contains(area, `wiki`)]'
 
         - name: Get all wikis in a project
           text: |