Fix/err

[romashka-btc]

Fix: Corrected typos in multiple source files

What was changed

1. Corrected typos:
   • Replaced emtpy with empty in aztec/src/utils/array/subarray.nr:28.
   • Replaced collpased with collapsed in aztec/src/utils/array/collapse.nr:12.
   • Replaced protocl with protocol in aztec/src/context/globals/public_global_variables.nr:1.
   • Replaced Authenticaion with Authentication in authwit/src/auth.nr:13.

Why these changes were made

• Fixing typos ensures the clarity, professionalism, and accuracy of the codebase.
• Correct terminology avoids potential confusion for developers and readers.

Additional Notes

• These changes focus solely on fixing typographical errors and do not affect functionality.