i18n(en): shorten banner text for archived repos (#7032)
Followup to https://codeberg.org/forgejo/forgejo/pulls/6928. I've figured out that the text can actually be shortened by avoiding duplication of "this repository" with "it's".
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/7032
Reviewed-by: floss4good <floss4good@noreply.codeberg.org>
Co-authored-by: 0ko <0ko@noreply.codeberg.org>
Co-committed-by: 0ko <0ko@noreply.codeberg.org>
authored by