Update robostack.yaml

[mosfet80]

update micromamba to last version. -> Fix repoquery subcommand for Python 3.11/3.12

Description

Add your description here

Checklist

• [ ] If you are addressing rendering issues, please provide:
  • [ ] Images of both, broken and fixed renderings.
  • [ ] Source code to reproduce the issue, e.g. a YAML or rosbag file with a MarkerArray msg.
• [ ] If you are changing GUI, please include screenshots showing how things looked before and after.
• [ ] Choose the proper target branch: latest release branch, for non-ABI-breaking changes, future release branch otherwise. Due to the lack of active maintainers, we cannot provide support for older release branches anymore.
• [ ] Did you change how RViz works? Added new functionality? Do not forget to update the tutorials and/or documentation on the ROS wiki
• [ ] While waiting for someone to review your request, please consider reviewing another open pull request to support the maintainers of RViz. Refer to the RViz Wiki for reviewing guidelines.

[rhaschke]

I leave updates to the RobotStack workflow to the corresponding maintainers.