Update README.md

Author: mutec

README.md

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 # de.mysterycode.wcf.api.chartjs
-ChartJS for WoltLab Suite Core 5.3+
+Chart.js for WoltLab Suite Core 5.3+
+
+This package provides [Chart.js](https://www.chartjs.org/) for WoltLab Suite Core 5.3+.
+
+## License
+Chart.js is available under the [MIT license](https://opensource.org/licenses/MIT).