Update README.md update to v2.1 PCB images

README.md

@@ -6,7 +6,7 @@ The CubeSat Simulator https://github.com/alanbjohnston/CubeSatSim/wiki is a low
 
 The three custom PCBs are the Main, Battery and Solar boards.  Information including schematics and gerbers is in https://CubeSatSim.org/hardware
 
-<img width="200" alt="cubesatsim-main-v2 0 1_top" src="https://github.com/alanbjohnston/CubeSatSim/blob/b3178fc979a88031f06365590ba47a358158fd73/hardware/v2.0/cubesatsim-main-v2.0_top.png"> <img width="200" alt="cubesatsim-battery-v2 0_top" src="https://github.com/alanbjohnston/CubeSatSim/blob/b3178fc979a88031f06365590ba47a358158fd73/hardware/v2.0/cubesatsim-battery-v2.0.1_top.png"> <img width="200" alt="cubesatsim-solar-v2 0_top" src="https://github.com/alanbjohnston/CubeSatSim/blob/b3178fc979a88031f06365590ba47a358158fd73/hardware/v2.0/cubesatsim-solar-v2.0.1_top.png">
+<img width="200" alt="cubesatsim-main-v2 0 1_top" src="https://github.com/alanbjohnston/CubeSatSim/blob/628fd65edbb01fb772a9f223605d969a0aad14bd/hardware/v2.1/cubesatsim-main-v2.1.0_top.png"> <img width="200" alt="cubesatsim-battery-v2 0_top" src="https://github.com/alanbjohnston/CubeSatSim/blob/4d079b486116180071c4dbf64ae2464518a63bdd/hardware/v2.1/cubesatsim-battery-v2.1.0_top.png"> <img width="200" alt="cubesatsim-solar-v2 0_top" src="https://github.com/alanbjohnston/CubeSatSim/blob/c904c66d7c8fb44a3d088d0cbebf24903cf3572c/hardware/v2.1/cubesatsim-solar-v2.1.0_top.png">
 
 For information about the AMSAT STEM education program based on the CubeSatSim, see https://CubeSatSim.org/EducatorsGuide