🌐 Add Polish translation for `docs/pl/docs/index.md` (#4245)
Co-authored-by: Dawid Dutkiewicz <dutkiewicz@users.noreply.github.com>
Co-authored-by: Dima Tisnek <dimaqq@gmail.com>
Co-authored-by: Bart Skowron <bxsx@bartskowron.com>
Co-authored-by: Bart Skowron <bart.skowron@rollbar.com>