Fix bug in dotfiles script where the bash script tried to source .zshrc
Fix bug in dotfiles script where the bash script tried to source .zshrc

This commit replaces the source command with `exec zsh`, which instead calls zsh to reload its zshrc

monsendag/dotfiles,monsendag/dotfiles,monsendag/dotfiles,monsendag/dotfiles,monsendag/dotfiles,monsendag/dotfiles