Add Flycast to the newly created sega section (#863)

README.md

@@ -77,6 +77,7 @@
       - [Emulation Frontends/Configurators](#emulation-frontends/configurators)
       - [Microsoft](#microsoft)
       - [Nintendo](#nintendo)
+      - [Sega](#sega)
       - [Sony](#sony)
       - [ZX Spectrum](#zx-spectrum)
   - [Graphics](#graphics)
@@ -866,6 +867,9 @@ _For a more comprehensive/advanced/better categorized/... list of Linux audio so
 - [![Open-Source Software][oss icon]](https://github.com/visualboyadvance-m/visualboyadvance-m) [Visual Boy Advance-M](https://www.visualboyadvance-m.org/) - A Gameboy and Gameboy Advance Emulator that is still undergoing active development and can even emulate a system link between two gameboys.
 - [![Open-Source Software][oss icon]](https://sourceforge.net/projects/zsnes/) [ZSNES](https://www.zsnes.com/) - A capable and commonly used Super Nintendo Entertainment System/Super Famicom emulator, many consider it the gold standard in SNES/Super Famicom emulation.
 
+##### Sega
+- [![Open-Source Software][oss icon]](https://github.com/flyinghead/flycast) [Flycast](https://github.com/flyinghead/flycast) - A multiplatform Sega Dreamcast emulator. Available for Windows, macOS, Linux, Android and various home consoles.
+
 ##### Sony
 
 - [![Open-Source Software][oss icon]](https://github.com/stenzek/duckstation) [DuckStation](https://www.duckstation.org/) - DuckStation is a multiplatform PSX emulator for Windows, macOS, Linux and Android.