docs(sphinx): fix copyright year

[mdevolde]

docs(sphinx): fix copyright year

Why the pull request was made

To fix the copyright year in the sphinx docs that I forgot to edit.

Summary of changes

• Copyright year in sphinx docs from 2026 to 2026.
• Add a comment in the docs conf file to remember to sync this copyright year with the license.

Screenshots (if appropriate):

Not applicable.

How has this been tested?

Not applicable.

Resources

Not applicable.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (changes to documentation only)
• Refactor / code style update (non-breaking change that improves code structure or readability)
• Tests / CI improvement (adding or updating tests or CI configuration only)
• Other (please describe):

Checklist

• Followed the project's contributing guidelines.
• Updated any relevant tests.
• Updated any relevant documentation.
• Added comments to your code where necessary.
• Formatted your code, run the linters, checked types and tests.