set 5 to the font size

Author: diamant3

index.md

@@ -26,6 +26,7 @@ Need some in-depth knowledge? [Go here](documentation.html).
 {: .fs-6 .fw-700 }
 
 If you have ideas, suggestions or questions, please don't hesitate to use our [GitHub Discussions](https://github.com/pspdev/pspdev/discussions).
+{: .fs-5 }
 
 If you need help or would like to contribute, don't hesitate to join us on [Discord](https://discord.gg/bePrj9W) or open an issue on [GitHub](https://github.com/pspdev/pspdev/issues). See you there!
 {: .fs-5 }