Fix a comment typo in flce (linkedin#256)

## Summary
os huge -> is huge

## Testing Done

- Hardware Type: <BLANK>
- [ ] run `make test` to ensure correctness
- [ ] run `make checkstyle` to ensure code style
- [ ] run `make test-convergence` to ensure convergence

Author: Tcc0403

src/liger_kernel/ops/fused_linear_cross_entropy.py

@@ -97,7 +97,7 @@ def fused_linear_cross_entropy_forward(
 
         # gradient of logits_chunk is computed in-place by the above triton kernel.
         # Following HuggingFace model source code, we do the forward and backward
-        # w.r.t. logits in fp32 for numerical stability especially as the num classes (vocab size) os huge.
+        # w.r.t. logits in fp32 for numerical stability especially as the num classes (vocab size) is huge.
         # (reference: https://github.com/huggingface/transformers/blob/v4.42.4/src/transformers/models/llama/modeling_llama.py#L1194)
         # Propagating to lm_head's backward, we'll switch back to the original dtype.
         logits_chunk = logits_chunk.to(dtype)