setup.cfg: remove quotes for content-type
Tested at: https://test.pypi.org/project/vinvelivaanilai/1.0.4a0/
Signed-off-by: Patrick Dohmen dl4pd@darc.de
Tested at: https://test.pypi.org/project/vinvelivaanilai/1.0.4a0/
Signed-off-by: Patrick Dohmen dl4pd@darc.de