Reorders git options for uncommitted modifications nudge

-C path must come before the subcommand.

Co-authored-by: Carlo Cabrera <github@carlo.cab>

Library/Homebrew/diagnostic.rb

@@ -703,7 +703,7 @@ module Homebrew
             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 stash -u -C #{path} && git clean -d -f -C #{path}
+              git -C "#{path}" stash -u && git -C "${path}" clean -d -f
           EOS
 
           modified = status.split("\n")