Add docs on how to run klc-check manually
Added text:
If one of the tests fail, you can run klc-check manually, e.g.
./klc-check/check_symbol.py klc-check/test_symbol/CI_Test_S6.x.kicad_sym -vv -c 'Fail__S6.2__ComaKeywords'
Added text:
If one of the tests fail, you can run klc-check manually, e.g.
./klc-check/check_symbol.py klc-check/test_symbol/CI_Test_S6.x.kicad_sym -vv -c 'Fail__S6.2__ComaKeywords'