Remove debug print statement and bump to v1.4.3

[Copilot]

Removes leftover debug print from OpenAI completion client and bumps patch version.

Changes

• completion.py: Removed print("Setting the temperature ", ...) statement
• Version: 1.4.2 → 1.4.3 in pyproject.toml and skllm/__init__.py

Original prompt

In https://github.com/BeastByteAI/scikit-llm/blob/main/skllm/llm/gpt/clients/openai/completion.py on line 52 there is an extra print statement (redundant). Remove it + bump the patch version (init + pyproject)

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