Update LICENSE

LICENSE

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-GemmaX2-28 is a model based on the Gamma2 architecture, further pre-trained and fine-tuned with instruction-based objectives across 28 languages, and Gemma is provided under and subject to the Gemma Terms of Use found at ai.google.dev/gemma/terms.
+Copyright (C) 2024 Xiaomi Corporation.
+
+Licensed under the [Gemma](https://ai.google.dev/gemma/terms).