Fix `go generate`

[bastianjoel]

The environment.md generation is currently disabled because of OpenSlides/openslides-go#176

[ostcar]

I don't get it. Why was this necessary?

[bastianjoel]

It does not terminate with the wait for postgres

[bastianjoel]

It bothers again: https://github.com/OpenSlides/openslides-go/actions/runs/25504329612/job/74846740912

@ostcar Could you please find a solution? Right now I fell like fixing this generate script cost more time than it probably would cost just maintaining that readme manually.