[Bug] Path Fix

Hi

Thanks for releasing this cool work together with code and checkpoints!

You may wanna fix the gemma-2 path in the sample code.

https://github.com/KlingTeam/SVG-T2I/blob/03f14b61c82c6e9bbde6d27878aeac5504a234f3/svg_t2i/sample_svg_t2i.py#L229

```python
    gemma_2_ckpt = "google/gemma-2-2b"   # Fix
```