License information is file outdated and shall be updated

[OliverFendt]

In the file ionicons-4.1.2/src/scss/ionicons.scss the following information is provided:

Android-style icons originally built by Google’s
Material Design Icons: https://github.com/google/material-design-icons
used under CC BY http://creativecommons.org/licenses/by/4.0/
Modified icons to fit ionicon’s grid from original.

when you surf to the project repo (https://github.com/google/material-design-icons) you find as license for the project and the icons Apache-2.0 and not CC-BY-4.0 as mentioned above. The project changed the license 2 years ago from CC-BY-4.0 to Apache-2.0. Can you please correct thi,s otherwise users of the software, which rely on the information provided by your project might not be able to be license compliant.