chore: update magic number for face height

[phantumcode]

Issue #, if available:

Description of changes: Fix incorrect magic number for calculating face height

Check points: (check or cross out if not relevant)

• [x] Added new tests to cover change, if needed
• [x] Build succeeds with all target using Swift Package Manager
• [x] All unit tests pass
• [x] Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• [x] Documentation update for the change if required
• [x] PR title conforms to conventional commit style
• [x] If breaking change, documentation/changelog update with migration instructions

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.