[Bug]: sed: in-place editing only works for regular files

[zestysoft]

What happened?

./setup.sh assumes that the dot files to be edited are regular files when they could be symlinked.

Version check

• [X] Yes I was.

Relevant log output

sed: /Users/username/.zshrc: in-place editing only works for regular files
sed: /Users/username/.zshrc: in-place editing only works for regular files

Relevant screenshots (optional)

No response