Update README.md

Author: zhigenzhao

README.md

@@ -30,7 +30,7 @@ cp tmp/XRoboToolkit-PC-Service/RoboticsService/PXREARobotSDK/build/libPXREARobot
 # rm -rf tmp
 
 # Build the project
-pip install pybind11
+conda install -c conda-forge pybind11
 
 pip uninstall -y xrobotoolkit_sdk
 python setup.py install
@@ -154,4 +154,4 @@ xrt.close()
 - 0: Pelvis, 1: Left Hip, 2: Right Hip, 3: Spine1, 4: Left Knee, 5: Right Knee
 - 6: Spine2, 7: Left Ankle, 8: Right Ankle, 9: Spine3, 10: Left Foot, 11: Right Foot
 - 12: Neck, 13: Left Collar, 14: Right Collar, 15: Head, 16: Left Shoulder, 17: Right Shoulder
-- 18: Left Elbow, 19: Right Elbow, 20: Left Wrist, 21: Right Wrist, 22: Left Hand, 23: Right Hand
+- 18: Left Elbow, 19: Right Elbow, 20: Left Wrist, 21: Right Wrist, 22: Left Hand, 23: Right Hand