Submodule warning logging interferes with the output of the main thread.

[rexim]

https://github.com/tsoding/snitch/blob/2ed5d9374f1cb76cfe445870d1c11f9b7f331945/project.go#L222

It happens in a worker thread and interferes with the output of the main thread.

streamer@rexim-B590:~/Programming/tsoding/skedudle$ ~/go/bin/snitch report --prepend-body 'introduced in #24'
Detected project: https://github.com/tsoding/skedudle
src/json_test.c:26:         // TODO: parse_json_number treats -10.-10e-2 as two separate numbers
Issue Title: parse_json_number treats -10.-10e-2 as two separate numbers
Do you want to report this?  [y/n] [WARN] `third_party/frozen` is probably a submodule. Skipping it for now...
y