Bump versions for LTS 03/21/23 release

[abhipsaMisra]

Release Notes:

Microsoft Azure IoT SDKs for .NET LTS patch Release 2023-03-21

This release is a patch for the Microsoft Azure IoT Hub SDK for .NET LTS patch Release 2023-01-24 LTS release.

Microsoft.Azure.Devices.Client 1.36.8

• Fix bug where client's retry policy applied n^2 times rather than n times (Bring semaphore synchronization updates in retry delegating handler to LTS #3148)
• Decouple client open-close semaphore from callback subscription semaphore (Bring semaphore synchronization updates in retry delegating handler to LTS #3148)
• Set transport state to 'closed' when CloseAsync() is called (Set state to 'closed' when CloseAsync() is called (#3149) #3160)

Microsoft.Azure.Devices 1.31.5

• Address fix for FxCop analyzer issue (Bring semaphore synchronization updates in retry delegating handler to LTS #3148)

[abhipsaMisra]

/azp run

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