Looks like you applied an "identical" change rather than merging the
actual commit:
% make fetch/flymake-proselint
emacs --no-site-lisp --batch -l admin/elpa-admin.el -f elpaa-batch-fetch-and-show
"flymake-proselint"
Fetching updates for flymake-proselint...
Upstream of flymake-proselint has DIVERGED!
Local changes:
1d240a7b69 manuel-uberti@.. Move to SourceHut
Upstream changes:
42b3ffa259 manuel-uberti@.. Move to SourceHut
2031f3df76 manuel.uberti@.. Update format
de88c00d8b manuel.uberti@.. Update URL
%
IOW maybe you used `rebase` rather then `merge`?