Fix naming

README.md

franka_control/mainpage.dox

franka_control/package.xml

franka_example_controllers/mainpage.dox

franka_example_controllers/package.xml

franka_gripper/mainpage.dox

franka_gripper/package.xml

franka_hw/mainpage.dox

franka_hw/package.xml

franka_msgs/mainpage.dox

franka_msgs/package.xml

franka_ros/mainpage.dox

franka_visualization/mainpage.dox

franka_visualization/package.xml

panda_moveit_config/mainpage.dox

panda_moveit_config/package.xml