Security sprint: Update content that features the ROPC flow

[Dickson-Mwendia]

This PR fixes the ROPC grant issues identified in the MSAL Python docset

Cc: @SHERMANOUKO @CelesteDG

[learn-build-service-prod[bot]]

Learn Build status updates of commit 5acde8b:

:warning: Validation status: warnings

File	Status	Preview URL	Details
msal-python-conceptual/getting-started/acquiring-tokens.md	:warning:Warning	View	Details
msal-python-conceptual/advanced/aad-b2c.md	:white_check_mark:Succeeded	View
msal-python-conceptual/advanced/username-password-authentication.md	:white_check_mark:Succeeded	View

msal-python-conceptual/getting-started/acquiring-tokens.md

• Line 127, Column 251: [Warning: file-not-found - See documentation] Invalid file link: 'username-password-authentication.md'.

For more details, please refer to the build report.

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[learn-build-service-prod[bot]]

Learn Build status updates of commit 824102d:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
msal-python-conceptual/advanced/aad-b2c.md	:white_check_mark:Succeeded	View
msal-python-conceptual/advanced/username-password-authentication.md	:white_check_mark:Succeeded	View
msal-python-conceptual/getting-started/acquiring-tokens.md	:white_check_mark:Succeeded	View

For more details, please refer to the build report.

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[learn-build-service-prod[bot]]

Learn Build status updates of commit 30673f2:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
msal-python-conceptual/advanced/aad-b2c.md	:white_check_mark:Succeeded	View
msal-python-conceptual/advanced/msal-python-adfs-support.md	:white_check_mark:Succeeded	View
msal-python-conceptual/advanced/username-password-authentication.md	:white_check_mark:Succeeded	View
msal-python-conceptual/getting-started/acquiring-tokens.md	:white_check_mark:Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel