* commit '6f403e695163a03fcaff8fd32e2c007aa0268e7f': docs: Fixed broken urls in the UI testing training main page and revised intro to the 'Testing UI for a Single App' class.
* commit '6f403e695163a03fcaff8fd32e2c007aa0268e7f': docs: Fixed broken urls in the UI testing training main page and revised intro to the 'Testing UI for a Single App' class.