Use correct quotes for humans

Author: scottchiefbaker

README.md

@@ -17,6 +17,7 @@ If you are using a ZSH framework like [zgenom](https://github.com/jandamm/zgenom
 `diff-so-fancy` is also available from the [NPM registry](https://www.npmjs.com/package/diff-so-fancy), [brew](https://formulae.brew.sh/formula/diff-so-fancy), as a package on [Nix](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/version-management/diff-so-fancy/default.nix), [Fedora](https://packages.fedoraproject.org/pkgs/diff-so-fancy/diff-so-fancy/), in the [Arch extra repo](https://archlinux.org/packages/extra/any/diff-so-fancy/), and as [ppa:aos for Debian/Ubuntu Linux](https://github.com/aos/dsf-debian).
 
 Issues relating to packaging ('installation does not work', 'version is out of date', etc.) should be directed to those packages' own repositories/issue trackers where applicable.
+Issues relating to packaging ("installation does not work", "version is out of date", etc.) should be directed to those packages' repositories/issue trackers where applicable.
 
 **Note:** Windows users may need to install [MinGW](https://sourceforge.net/projects/mingw/files/) or the [Windows subsystem for Linux](https://docs.microsoft.com/en-us/windows/wsl/install-win10).