Fix Mixtral typo

[Tcc0403]

Summary

Fixed #104 .

Testing Done

Need help for make test.

• Hardware Type: RTX-3080-10G
• run make test to ensure correctness
• run make checkstyle to ensure code style
• run make test-convergence to ensure convergence

❯ make checkstyle
flake8 .; flake8_status=$?; \
isort .; isort_status=$?; \
black .; black_status=$?; \
if [ $flake8_status -ne 0 ] || [ $isort_status -ne 0 ] || [ $black_status -ne 0 ]; then \
        exit 1; \
fi
Skipped 2 files
All done! ✨ 🍰 ✨
53 files left unchanged.

❯ make test-convergence
HF_DATASETS_OFFLINE=1 python -m pytest --disable-warnings test/convergence
============================================ test session starts =============================================
platform linux -- Python 3.10.12, pytest-8.3.2, pluggy-1.5.0
rootdir: /home/tcc/Liger-Kernel
collected 12 items

test/convergence/test_mini_models.py ........                                                          [ 66%]
test/convergence/test_mini_models_no_logits.py ....                                                    [100%]

======================================= 12 passed in 79.65s (0:01:19) ========================================