[Snyk] Security upgrade debian from 9.5-slim to stretch-20210621-slim#60

Merged

B020239 merged 1 commit intomainfrom

snyk-fix-7bcc5dbdf3354168717d05d0159d27c5

Jul 2, 2021

Commits on Jul 1, 2021

fix: translations/ko-KR/content/actions/creating-actions/dockerfile-support-for-github-actions.md to reduce vulnerabilities
snyk-bot
committed