[Merged by Bors] - Enlarge Kafka and MinIO disk size in demo

[sbernauer]

Description

After running the demo for some time kafka's disk run full. We actually had the same thing during the hackathon in Karlsruhe ^^

Review Checklist

• [ ] Code contains useful comments
• [ ] (Integration-)Test cases added (or not applicable)
• [ ] Documentation added (or not applicable)
• [ ] Changelog updated (or not applicable)
• [ ] Cargo.toml only contains references to git tags (not specific commits or branches)

Once the review is done, comment bors r+ (or bors merge) to merge. Further information

[sbernauer]

bors r+

[bors[bot]]

Pull request successfully merged into main.

Build succeeded:

• Run Rustfmt