"Read Me" References both ZSH and Bash RC in the same command snippet

[Guy Elsmore-Paddock]

The readme provides a code snippet that defines XDG_CONFIG_HOME in the .zshrc and then sources the .bashrc. It should be consistent with the use of .bashrc or .zshrc.

[Devin Stein]

Thanks for noticing and making an issue @GuyPaddock