Normalize quantized model names

ggml-model-whisper-base-q5_1.bin

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ggml-model-whisper-base.en-q5_1.bin

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ggml-model-whisper-large-q5_0.bin

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ggml-model-whisper-medium-q5_0.bin

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ggml-model-whisper-medium.en-q5_0.bin

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ggml-model-whisper-small-q5_1.bin

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ggml-model-whisper-small.en-q5_1.bin

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ggml-model-whisper-tiny-q5_1.bin

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ggml-model-whisper-tiny.en-q5_1.bin

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