docs.microsoft.com->learn.microsoft.com in Azure document

[tkmru]

Description

The Azure document URL has changed from docs.microsoft.com to learn.microsoft.com. This is a pull request to follow this change.

Type of change

Select the relevant option(s):

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works (optional)
• New and existing unit tests pass locally with my changes