Fix typo in docstring for teacher_model_init_kwargs

[albertvillanova]

Fix typo in docstring for teacher_model_init_kwargs.

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Note

Low Risk
Low risk: documentation-only changes correcting a malformed type annotation; no runtime logic or defaults are modified.

Overview
Fixes a typo in the parameter docstrings for teacher_model_init_kwargs across GKDConfig, GOLDConfig, and MiniLLMConfig, correcting dict[str, Any]] to dict[str, Any] (and the corresponding ... or None form in GOLDConfig).

No functional code or configuration behavior changes are included.

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[HuggingFaceDocBuilderDev]

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