[Tails-l10n] errors in bg.po

While releasing 6.7, I found these errors:

    i18nspector is not happy:
        E: perl-brace-format-string-unknown-argument msgid 1y: count in msgstr[0] but not in msgid
        E: perl-brace-format-string-unknown-argument msgid 1d: count in msgstr[0] but not in msgid
        E: perl-brace-format-string-unknown-argument msgid 1m: count in msgstr[0] but not in msgid

--
boyska