Update README.md

adding synthoseis package to seismic section.

this package, which was created and open-sourced by Shell, generates synthetic seismic data based of a given rock properties model.

README.md

@@ -64,6 +64,7 @@ Awesome software projects sub-categorized by focus.
 - [SeisComp](https://github.com/SeisComP/seiscomp) – ![Python](media/icon/python.png) ![C++](media/icon/cplusplus.png) Seismic observatory automation toolkit. Autodetection, storage, sharing, processing data and more.
 - [Seismic Un\*x](https://github.com/JohnWStockwellJr/SeisUnix) – ![C](media/icon/c.png) Seismic data processing suite.
 - [SeismicZFP](https://github.com/equinor/seismic-zfp) – ![Python](media/icon/python.png) Convert SEG-Y/ZGY files to compressed [SGZ files](https://github.com/equinor/seismic-zfp/blob/master/docs/file-specification.md) & retrieve arbitrary sub-volumes from these, fast.
+- [synthoseis](https://github.com/sede-open/synthoseis) – ![Python](media/icon/python.png) Synthoseis is an open-source, Python-based tool used for generating pseudo-random seismic data, as described in [Synthetic seismic data for training deep learning networks](https://library.seg.org/doi/abs/10.1190/int-2021-0193.1).
 ### Ground-penetrating radar
 - [gprMax](http://www.gprmax.com) – ![Python](media/icon/python.png) ![CUDA](media/icon/cuda.png) Finite-difference time-domain electromagnetic wave propagation simulator (on CPU and GPU).
 - [GPRPy](https://github.com/NSGeophysics/GPRPy) – ![Python](media/icon/python.png) Multi-format, GUI-based GPR processing and visualization.