1.20.4-slim

What's Changed

• Configure Renovate by @renovate[bot] in #29
• Update elixir Docker tag to v1.20.4 by @renovate[bot] in #30
• Update actions/checkout action to v7 by @renovate[bot] in #31

New Contributors

• @renovate[bot] made their first contribution in #29

Full Changelog: v1.18.4-slim...v1.20.4-slim