Fix comments during demo

[saraeq]

Description

Fixed 3 comments that came after Demo of Python SDK Task 29102:

• Make sure the notebook says credentials, and not credential

• User must have timeseries.write rights to do write operations to the API

• status=[192] and statusFilter=[192] means that status is good

See Task 29198

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Nothing to test

Checklist:

• I have performed a self-review of my own code
• I have commented my code in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding changes to the architecture
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes