Update changelog documentation site for codeql-cli-2.26.4

[codeql-ci-app]

This pull request was automatically generated to synchronize the CodeQL changelog documentation based on recent changes to CodeQL.

Overview

• Ensures that the documentation remains current with the source Markdown changelogs.
  • Incorporates any detected changes in the CodeQL CLI changelog.
  • Incorporates any detected changes in the CodeQL languages' changelogs.
  • Regenerates the formatted changelog documentation.

Next Steps

• Please review the rendered docs and verify that the changelog content is correct. Edit as necessary.
• Once you're satisfied with the changes, please merge this PR.