fix language select in footer

[areai51]

What does this PR do?

Fixes the issue where the language selector on the footer wasnt working

If you paste a large clearly AI generated description here your PR may be IGNORED or CLOSED!

How did you verify your code works?

Tested the astro docs site locally

[github-actions]

Hey! Your PR title fix language select in footer doesn't follow conventional commit format.

Please update it to start with one of:

• feat: or feat(scope): new feature
• fix: or fix(scope): bug fix
• docs: or docs(scope): documentation changes
• chore: or chore(scope): maintenance tasks
• refactor: or refactor(scope): code refactoring
• test: or test(scope): adding or updating tests

Where scope is the package name (e.g., app, desktop, opencode).

See CONTRIBUTING.md for details.

[adamdotdevin]

Closing in favor of #13109