Using the coverage action gives the following syntax error:

/opt/hostedtoolcache/Python/3.8.3/x64/bin/gcovr -C build coverage --verbose
usage: gcovr [options] [search_paths...]
gcovr: error: unrecognized arguments: -C
##[error]The process '/opt/hostedtoolcache/Python/3.8.3/x64/bin/gcovr' failed with exit code 2