0.6 version bmp, changelog, and misc tweaks (#2228)

### What
Things from #2208 that should be
merged back into `main`

### Checklist
* [x] I have read and agree to [Contributor
Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md)

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PR Build Summary: https://build.rerun.io/pr/2228

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Co-authored-by: Jeremy Leibs <jeremy@rerun.io>
Co-authored-by: Andreas Reich <r_andreas2@web.de>