Update README.md (added e-book support)

Author: Vito0912

README.md

@@ -40,7 +40,7 @@ A big thank you to [Weblate](https://weblate.org) for providing their services!
 |---------------------------------------|:-------:|:--------------:|:-------:|:-----:|:--------------:|
 | Playing Audio                         |    ✅    |       ✅        |    ✅    |   ✅   |       ✅        |
 | Playing Podcasts                      |    ✅    |       ✅        |    ✅    |   ✅   |       ✅        |
-| Reading eBooks*<sup>5</sup>           |    ❌    |       ❌        |    ❌    |   ❌   |       ❌        |
+| Reading eBooks*<sup>5</sup>           |    🟨    |       🟨        |    🟨    |   🟨   |       🟨        |
 | Up-to-date Sync                       |    ✅    |       ✅        |    ✅    |   ✅   |       ✅        |
 | Advanced Player Controls*<sup>1</sup> |    ✅    |       ✅        |    ✅    |   ✅   |       ✅        |
 | Car Support*<sup>2</sup>              |   🟨    |       🟨       |    ❌    |   ❌   |       ❌        |