Fix spelling: appontment to appointment

[StingRayZA]

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Title:

Fix spelling: appontment to appointment.

Description:

Fixes the occurrences of the word appontment to appointment
Looking at adding an additional implementation, and I was stumbling on the spelling of the existing method. This change fixes it throughout the project.

Additional Information:

• Did you add any dependencies or external libraries?
• Did you modify the documentation? If so, how?

Checklist:

• I followed the Coding Style Guide: https://peps.python.org/pep-0008/.
• I added clear and concise comments to my code.
• I added unit tests for new features or bug fixes (if applicable).
• I ensured my changes do not introduce regressions.

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• Issue reference (if related to an existing issue): # (issue number)

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