Update concept-conditional-access-grant.md

Added two more apps that now support policy assurance:
- Microsoft Power Apps
- Microsoft Field Service (Dynamics 365)

Author: Mahopper

articles/active-directory/conditional-access/concept-conditional-access-grant.md

@@ -151,6 +151,8 @@ The following client apps are confirmed to support this setting:
 - Microsoft Teams
 - Microsoft To Do
 - Microsoft Word
+- Microsoft Power Apps
+- Microsoft Field Service (Dynamics 365)
 - MultiLine for Intune
 - Nine Mail - Email and Calendar
 - Notate for Intune