Fix code typo in code examples

Hello 👋
Based on [this PR for 2.2B version](https://huggingface.co/HuggingFaceTB/SmolVLM2-2.2B-Instruct/discussions/9), this is the same change just for a different model (I will open one more for 500M 😉).

I have included param `dtype=torch.bfloat16` when moving the processed inputs to CUDA (this is included in some examples, but not all).
This should avoid mismatched tensor types between model weights and inputs.

Cheers,
Michal

README.md

@@ -126,7 +126,7 @@ inputs = processor.apply_chat_template(
     tokenize=True,
     return_dict=True,
     return_tensors="pt",
-).to(model.device)
+).to(model.device, dtype=torch.bfloat16)
 
 generated_ids = model.generate(**inputs, do_sample=False, max_new_tokens=64)
 generated_texts = processor.batch_decode(
@@ -162,7 +162,7 @@ inputs = processor.apply_chat_template(
     tokenize=True,
     return_dict=True,
     return_tensors="pt",
-).to(model.device)
+).to(model.device, dtype=torch.bfloat16)
 
 generated_ids = model.generate(**inputs, do_sample=False, max_new_tokens=64)
 generated_texts = processor.batch_decode(