Update dependabot's gh-actions section

[CasperWA]

Description

Group updates in a single PR.

AI Summary

This pull request updates the Dependabot configuration in .github/dependabot.yml to improve the grouping and management of dependencies for both Python and GitHub Actions. The main changes involve renaming and restructuring the dependency groups for better clarity and separation between version and security updates.

Dependabot group restructuring:

• Renamed the packages group to python and the security group to python-security for Python dependencies, clarifying their purpose and scope.
• Added new groups actions and actions-security for GitHub Actions dependencies, allowing separate handling of version and security updates for Actions.

Type of change

• Bug fix.
• New feature.
• Documentation update.

Checklist for the reviewer

This checklist should be used as a help for the reviewer.

• Is the change limited to one issue?
• Does this PR close the issue?
• Is the code easy to read and understand?
• Do all new feature have an accompanying new test?
• Has the documentation been updated as necessary?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.34%. Comparing base (fc731e2) to head (e143bd1).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #700   +/-   ##
=======================================
  Coverage   84.34%   84.34%           
=======================================
  Files          26       26           
  Lines         805      805           
=======================================
  Hits          679      679           
  Misses        126      126           

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[Copilot]

Pull request overview

This PR updates the repository’s Dependabot configuration to better group dependency updates, separating regular version bumps from security updates for both Python (pip) and GitHub Actions.

Changes:

• Renamed Python dependency groups to python and python-security.
• Added GitHub Actions dependency groups actions and actions-security to separate version vs. security updates.

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