model : update label for LFM2-24B-A2B (#19848)
* model : Update label for LFM2-24B-A2B
```
❯ build/bin/llama-bench -m /data/playground/checkpoints/LFM2-24B-A2B-Preview-Q4_0.gguf,/data/playground/checkpoints/LFM2-8B-A1B-Q4_0.gguf -p 1 -n 0
| model | size | params | backend | threads | test | t/s |
| ------------------------------ | ---------: | ---------: | ---------- | ------: | --------------: | -------------------: |
| lfm2moe 24B.A2B Q4_0 | 12.54 GiB | 23.84 B | CPU | 10 | pp1 | 30.35 ± 2.49 |
| lfm2moe 8B.A1B Q4_0 | 4.41 GiB | 8.34 B | CPU | 10 | pp1 | 49.24 ± 1.93 |
```
* Remove extra line
