Bump virtualenv from 20.4.2 to 20.4.3 in /.github/workflows#324

cjolowicz merged 1 commit intomaincjolowicz/nox-poetry:mainfrom

dependabot/pip/dot-github/workflows/virtualenv-20.4.3cjolowicz/nox-poetry:dependabot/pip/dot-github/workflows/virtualenv-20.4.3Copy head branch name to clipboard