Update README.md

Add Sparrow Families

Author: XinJingHao

README.md

@@ -287,8 +287,13 @@ buffer.add(S1, A1, R2, dw2, ct1)
 done2 = dw2+tr2
 ct2 = ~(done2)
 ```
+## The Sparrow families
+### Other Versions:
+- [Sparrow-V0](https://github.com/XinJingHao/Sparrow-V0): Original Version
+- [Sparrow-V1](https://github.com/XinJingHao/Sparrow-V1): Far more faster than V0
+- [Sparrow-V2](https://github.com/XinJingHao/Sparrow-V2): Dynamic Obstacles are supported
 
-## Important Differences from Sparrow-V0
+### Important Differences from Sparrow-V0
 
 Some features from Sparrow-V0 are modified in ```Sparrow-V1.0```. They are: