modified README.md

Author: hiroakioishi

README.md

@@ -8,3 +8,5 @@ UnityGraphicsProgramming
 - 雰囲気で始めるMarchingCubes入門 [@kaiware007](https://github.com/kaiware007) - https://github.com/IndieVisualLab/UnityGraphicsProgramming/tree/master/Assets/GPUMarchingCubes
 
 - SPH法による流体シミュレーション [@kodai100](https://github.com/kodai100) - https://github.com/IndieVisualLab/UnityGraphicsProgramming/tree/master/Assets/SPHFluid
+
+- 群のシミュレーションのGPU実装 [@hiroakioishi](https://github.com/hiroakioishi) - https://github.com/IndieVisualLab/UnityGraphicsProgramming/tree/master/Assets/BoidsSimulationOnGPU