[onnx] Align requrements for fp8 example

[AlexanderDokuchaev]

Changes

openvino==2026.2.1
transformers==5.0.0

Reason for changes

#4114

Related tickets

Tests

Test examples - success

[Copilot]

Pull request overview

Updates the SmolLM2 ONNX FP8 compression example to match newer dependency versions and adapts the example code to the updated Transformers chat templating output format.

Changes:

• Bumps openvino from 2026.2.0 to 2026.2.1 for the example environment.
• Bumps transformers from 4.53.0 to 5.0.0.
• Updates main.py to handle tokenizer.apply_chat_template(..., return_tensors="pt") as a batch-like structure by extracting input_ids explicitly.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
examples/llm_compression/onnx/smollm2_360m_fp8/requirements.txt	Aligns example dependency pins with newer OpenVINO and Transformers versions.
examples/llm_compression/onnx/smollm2_360m_fp8/main.py	Adjusts chat-template tokenization handling to work with Transformers 5 return structure.