Upstream about:addons recommended string in #41698

#41698 (closed) has a corresponding bug in bugzilla but it never progressed into ESR 128.

Not sure if it is too late for adding a string to ESR 128. Do we want to push upstream for the change in mozilla-central?

Otherwise, if we want to maintain it ourselves, maybe we should update our Fluent string to use attributes (at the time of implementation, Weblate did not yet support attributes) so we can clean out the data-basebrowser-l10n-fixup attribute in moz-support-link.

/cc @pierov