build(deps): bump slack-sdk from 3.19.5 to 3.21.3 in /.github/actions/pr_notifier#222

dependabot[bot] wants to merge 1 commit intomasterjespersoderlund/envoy:masterfrom

dependabot/pip/dot-github/actions/pr_notifier/slack-sdk-3.21.3jespersoderlund/envoy:dependabot/pip/dot-github/actions/pr_notifier/slack-sdk-3.21.3Copy head branch name to clipboard