build(deps): bump griefed/baseimage-ubuntu-jdk-8 from 2.0.3 to 2.0.4

Bumps griefed/baseimage-ubuntu-jdk-8 from 2.0.3 to 2.0.4.

---
updated-dependencies:
- dependency-name: griefed/baseimage-ubuntu-jdk-8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>