Install transformers from git for Qwen3-VL support

Qwen3-VL is not in released transformers versions yet, need main branch

iconclass-vlm-sft.py

@@ -3,7 +3,7 @@
 # dependencies = [
 #     "unsloth",
 #     "datasets",
-#     "transformers",
+#     "transformers @ git+https://github.com/huggingface/transformers.git",
 #     "trl",
 #     "huggingface-hub[hf_transfer]",
 #     "pillow",