Bump dart from 3.10.3-sdk to 3.10.4-sdk in /.github/docker#2145

pkwarren merged 1 commit intomainbufbuild/plugins:mainfrom

dependabot/docker/dot-github/docker/dart-3.10.4-sdkbufbuild/plugins:dependabot/docker/dot-github/docker/dart-3.10.4-sdkCopy head branch name to clipboard