Fix: Language Selector accessibility

[c-reetz]

Fix: Accesibility rules, regains 100% accesibility score, read more: https://dequeuniversity.com/rules/axe/4.7/select-name

What problem does this PR solve?

Fixes the accessibility parameter on the select for language selector

Is this PR adding a new feature? No

Fixes the accessibility paramterer on the select for language selector, thus regaining 100% accessibility score on PagesInsight for desktop, follows the rules laid by: https://dequeuniversity.com/rules/axe/4.7/select-name and adds an aria-label="" so it doesn't add extra text on the page itself.

Is this PR related to any issue or discussion? No

PR Checklist

• [ x] I have verified that the code works as described/as intended.
• This change adds a social icon which has a permissive license to use it.
• [x ] This change does not include any external library/resources.
• [ x] This change does not include any unrelated scripts (e.g. bash and python scripts).
• [ x] I have enabled maintainer edits for this PR.

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[sonarcloud]

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[hugo-sid]

Thanks @c-reetz, for improving accessibility of language selector.