WSL zsh Shell Prompt Not Updating

Im running Ubuntu 22.04 under WSL and would like to change my prompt info and look from the default.

I did the following

sudo apt install zshchsh -s /bin/zsh

I updated the .zshrc file to be PROMPT='%n@%m %1~ %#' but when I output $PROMPT it shows me the old value %K{blue}%n@%m%k %B%F{cyan}%(4~|...|)%3~%F{white} %# %b%f%k

is there another file I need to be updating or am I doing something incorrect ?