Updates CodeQL.yaml to exclude test files

[sruke]

Updates CodeQL.yaml to exclude test files

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Summary of the changes (Less than 80 chars)

Description

{Detail}

Fixes #{bug number} (in this specific format)

[Copilot]

Pull Request Overview

This pull request updates the CodeQL.yaml configuration file to exclude test and benchmark directories without using the wildcard pattern.

• Updated exclusion patterns for tests and benchmark directories
• Changed exclusion pattern for docs to remove the trailing wildcard
• Updated configuration comments in accordance with CodeQL documentation

Comments suppressed due to low confidence (2)

CodeQL.yaml:10

• Verify that excluding 'tests' without the wildcard pattern still correctly excludes all test files, as the glob behavior may differ from expectations.

    - "tests"

CodeQL.yaml:13

• Confirm that switching from 'docs/**' to 'docs' properly covers all documentation files, ensuring that subdirectories are excluded as intended.

    - "docs"

[jennyf19]