Readme - remove bad link
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<p>
<p align="center">
- <a href="https://circleci.com/gh/huggingface/transformers">
<img alt="Build" src="https://github.com/huggingface/tokenizers/workflows/Rust/badge.svg">
- </a>
<a href="https://github.com/huggingface/tokenizers/blob/master/LICENSE">
<img alt="GitHub" src="https://img.shields.io/github/license/huggingface/tokenizers.svg?color=blue">
</a>
