Add Python to the list of dependencies

[stefaniuk]

Description

The pre-commit framework requires Python to be installed. This change is to add it to the list of documented dependencies.

Type of changes

• [ ] Refactoring (non-breaking change)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would change existing functionality)
• [ ] Bug fix (non-breaking change which fixes an issue)

Checklist

• [x] I am familiar with the contributing guidelines
• [x] I have followed the code style of the project
• [ ] I have added tests to cover my changes
• [x] I have updated the documentation accordingly
• [ ] This PR is a result of pair or mob programming

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Sensitive Information Declaration

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• [x] I confirm that neither PII/PID nor sensitive data are included in this PR and the codebase changes.

[regularfry]

Yep, I think that works. Light touch and we're not reopening the .tool-versions can of worms.