1.17.0

Added

Changed

• Update AuthenticationManager.cs for GCC (ie UsGovernment) Regions #1047, #1048 [SteveWinward - Steve Winward]
• Updated pages export logic to support the new page header model via full width page header web part [czullu - Christian Zuellig]
• Bump System.Text.Json versions [jansenbe - Bert Jansen]