chore: fix typo

docs/blog/2.powerful-zsh-config.md

@@ -118,7 +118,7 @@ git clone https://github.com/zsh-users/zsh-history-substring-search "${ZSH_CUSTO
 sudo apt install thefuck autojump -y
 sed -i 's/^plugins=.*/plugins=(git\n extract\n thefuck\n autojump\n jsontools\n colored-man-pages\n zsh-autosuggestions\n zsh-syntax-highlighting\n zsh-history-substring-search\n you-should-use\n nvm\n debian)/g' ~/.zshrc
 # Enable nvm plugin feature to automatically read `.nvmrc` to toggle node version.
-sed -i '1s/^/zstyle ':omz:plugins:nvm' autoload yes\n/' ~/.zshrc
+sed -i "1s/^/zstyle ':omz:plugins:nvm' autoload yes\n/" ~/.zshrc
 # Install powerlevel10k and configure it.
 git clone --depth=1 https://github.com/romkatv/powerlevel10k.git "${ZSH_CUSTOM}"/themes/powerlevel10k
 sed -i 's/^ZSH_THEME=.*/ZSH_THEME="powerlevel10k\/powerlevel10k"/g' ~/.zshrc