You have uncommitted modifications to Homebrew/homebrew-core.
If this is a surprise to you, then you should stash these modifications.
Stashing returns Homebrew to a pristine state but can be undone
should you later need to do so for some reason.
git -C "/opt/homebrew/Library/Taps/homebrew/homebrew-core" stash -u && git -C "/opt/homebrew/Library/Taps/homebrew/homebrew-core" clean -d -f
Uncommitted files:
M Formula/g/git.rb
M Formula/o/openssl@1.1.rb