Warning: Homebrew's "sbin" was not found in your PATH but you have installed code example

Example 1: Warning: Homebrew's sbin was not found in your PATH but you have installed formulae that put executables in /usr/local/sbin.

export PATH="/usr/local/bin:$PATH"
source ~/.bash_profile

Example 2: Warning: Homebrew's "sbin" was not found in your PATH but you have installed

echo 'export PATH="/usr/local/sbin:$PATH"' >> ~/.zshrc