[Snyk] Security upgrade debian from 9.5-slim to stretch-20210816-slim#317

Open

snyk-bot wants to merge 1 commit intomainfrom snyk-fix-bc63032d64071f8d816cfe0cf96c3e10

+1-1

Commits on Sep 16, 2021

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