Leave a note about the `time_unix_milli` and `time_unix_micro` logger template variables
Leave a note about the `time_unix_milli` and `time_unix_micro` logger template variables

Signed-off-by: moznion <df170f0ea94bf87e29d8133af68fdf49501138ae@mail.moznion.net>

labstack/echox,labstack/echox,labstack/echox