update contributing.md
update contributing.md

gallowstree/ArduinoMazeNav,sayo9394/New_Arduino_Project,ladislas/Bare-Arduino-Project,grdys/MyArduinoProject,ilvadol/ardprj,joelcormack/New_Arduino_Project,gallowstree/ArduinoMazeNavV2,rkbren/New_Arduino_Project,rockstar/stoplight,gallowstree/ArduinoMazeNav,joelcormack/New_Arduino_Project,rajatdeshpande/barearduino,grdys/MyArduinoProject,javierzavalaponce/drum_tst,gallowstree/ArduinoMazeNavV2,javierzavalaponce/arduino_audio,RobotikUTT/eurobot-bare-module,rockstar/stoplight,garkanga/pibot_leo_slave,ladislas/Bare-Arduino-Project,ArthurTlprt/MyArduinoProject,ArthurTlprt/MyArduinoProject,garkanga/pibot_leo_slave,sayo9394/New_Arduino_Project,sayo9394/New_Arduino_Project,grdys/MyArduinoProject,sayo9394/New_Arduino_Project,javierzavalaponce/drum_tst,jorritnutma/pacmanArduino,ladislas/Bare-Arduino-Project,finalquest/RgbControll,jorritnutma/pacmanArduino,ilvadol/ardprj,caasjj/Arduino-Project,joelcormack/New_Arduino_Project,finalquest/RgbControll,gallowstree/ArduinoMazeNavV2,javierzavalaponce/drum_tst,joelcormack/New_Arduino_Project,rajatdeshpande/barearduino,saif-al-bakistani/MyArduinoProject,rkbren/New_Arduino_Project,garkanga/pibot_leo_slave,rajatdeshpande/barearduino,ilvadol/ardprj,rajatdeshpande/barearduino,gallowstree/ArduinoMazeNav,sagargp/hermes2-firmware,caasjj/Arduino-Project,ppara/serialMerge,jorritnutma/pacmanArduino,caasjj/Arduino-Project,rockstar/stoplight,garkanga/pibot_leo_slave,finalquest/RgbControll,sagargp/hermes2-firmware,grdys/MyArduinoProject,finalquest/RgbControll,javierzavalaponce/arduino_audio,ppara/serialMerge,rkbren/New_Arduino_Project,saif-al-bakistani/MyArduinoProject,sagargp/hermes2-firmware,gallowstree/ArduinoMazeNav,caasjj/Arduino-Project,ppara/serialMerge,ArthurTlprt/MyArduinoProject,caasjj/Arduino-Project,alexthorne90/msc_robot_arm,gallowstree/ArduinoMazeNavV2,alexthorne90/msc_robot_arm,ilvadol/ardprj,finalquest/RgbControll,rockstar/stoplight,javierzavalaponce/arduino_audio,rkbren/New_Arduino_Project,alexthorne90/msc_robot_arm,saif-al-bakistani/MyArduinoProject,javierzavalaponce/drum_tst