Fix actions at ubuntu-22.04

[lauramurgatroyd]

Description

CI is currently failing on github because there is no module named cil https://github.com/TomographicImaging/CIL/actions/runs/12349560947/job/34461234403

Last time the actions passed was when they were running on Ubuntu 22.04.5. ubuntu-latest recently updated which version its using to Ubuntu 24.04.1 and this is when our actions started failing

actions/runner-images#10636

If you see any issues with your workflows during transition period:
Switch back to Ubuntu 22 by changing workflow YAML to use runs-on: ubuntu-22.04 We support two latest LTS Ubuntu versions, so Ubuntu 22 will still be maintained for the next 2 years.
File an issue in this repository

Example Usage

Changes

Fixed actions at ubuntu-22.04

Testing you performed

Please add any demo scripts to https://github.com/TomographicImaging/CIL-Demos/tree/main/misc

Related issues/links

Checklist

• I have performed a self-review of my code
• I have added docstrings in line with the guidance in the developer guide
• I have updated the relevant documentation
• I have implemented unit tests that cover any new or modified functionality
• CHANGELOG.md has been updated with any functionality change
• Request review from all relevant developers
• Change pull request label to 'Waiting for review'

Contribution Notes

Please read and adhere to the developer guide and local patterns and conventions.

• The content of this Pull Request (the Contribution) is intentionally submitted for inclusion in CIL (the Work) under the terms and conditions of the Apache-2.0 License
• I confirm that the contribution does not violate any intellectual property rights of third parties

[lauramurgatroyd]

If we merge this I will open an issue for us to figure out how to get it working with ubuntu-latest

[MargaretDuff]

Thanks Laura

[paskino]

Let's open a new issue about updating to ubuntu-latest

[lauramurgatroyd]

#2017