Add tongyuan (#833)

* Update contributing members list in about.md, adding Santa Anna

* Add Suzhou Tongyuan Software to contributing members

Author: chrbertsch

content/about.md

@@ -21,7 +21,7 @@ Christian Bertsch (BOSCH) and Torsten Sommer (Dassault Systèmes) [projectleader
 AVL List, BOSCH, Dassault Systemes, dSPACE, ESI Group, Maplesoft, Modelon, PMSF, Siemens PLM, Synopsys
 
 **Further Contributing Members:**  
-Aarhus University, ABB, Algoryx, Altair, Akkodis, AMEPERE, Ansys, Augsburg University, Beckhoff, Bielefeld University of Applied Sciences and Arts, Boeing, Danfoss, DLR, Dynamica, EKS INTEC, ETAS, FMIOPT, Fraunhofer IEM, IAV, ITK Engineering, iVH, JuliaComputing, LTX, MachineWare, Model Based Innovation, orthogonal, Rensselaer Polytechnic Institute, Renault, Saab Group, Santa Anna IT Research Institute, Technical University Eindhoven, TLK Thermo, tracetronic, TU Dresden, Vector, Virtual Vehicle Research, Wolfram MathCore AB_and all Steering Committee Members_
+Aarhus University, ABB, Algoryx, Altair, Akkodis, AMEPERE, Ansys, Augsburg University, Beckhoff, Bielefeld University of Applied Sciences and Arts, Boeing, Danfoss, DLR, Dynamica, EKS INTEC, ETAS, FMIOPT, Fraunhofer IEM, IAV, ITK Engineering, iVH, JuliaComputing, LTX, MachineWare, Model Based Innovation, orthogonal, Rensselaer Polytechnic Institute, Renault, Saab Group, Santa Anna IT Research Institute, Suzhou Tongyuan Software & Control Technology, Technical University Eindhoven, TLK Thermo, tracetronic, TU Dresden, Vector, Virtual Vehicle Research, Wolfram MathCore AB_and all Steering Committee Members_
 
 **Members of the Advisory Committee:** 
 AIRBUS, blue automation, Caterpillar Energy Solutions, Claytex, COMSOL, DNV, EDAG, Fraunhofer (IIS/EAS First, SCAI), GM Motorsports, General Motors, Hyundai Motor Company, KEB Automation, LBL, Lieberr Aerospace Toulouse, NVIDIA, Knorr-Bremse Rail Vehicle Systems, MathWorks, Open Modelica Consortium, Samares Engineering, SINTEF Nordvest,  University of Halle, Volkswagen, Volvo Autonomous Solutions, VTI, _and all Contributing and Steering Committee Members_