Log: remove additional newlines due to Zig's default log fn

[QSmally]

From this example:

debug(request): /notavideofile
error(process): /home/joey/MultiMedia/notavideofile: error.FFmpegFailure (after 47.208ms)
debug(zap): setting content-type to application/json

debug(request): /video.mp4

Zap was adding an additional newline to the log lines now that Zig's standard logging facilities are used. It was quite inconsistent, too.

[renerocksai]

Thank you and sorry for the delay!