fix: correctly access arguments in reverse_text example

[PixelBoii]

Description

Fixes two simple typos in the reverse_text example.

Great repo!

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Test improvement

Testing

N/A

Test Coverage

N/A

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
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

Additional Notes

N/A

[CLAassistant]

All committers have signed the CLA.