gradio

08c2d491 - when adding custom head html, ensure there are no duplicate meta tags (#7510)

when adding custom head html, ensure there are no duplicate meta tags (#7510) * fix: remove old element to prevent duplication remove old element before append new meta tag to prevent duplication * fix: unexpected * Update * format * unexpected * unexpected * add changeset * improve * add changeset --------- Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>