chore: fix typo (#1439)

Author: MangelMaxime

README.md

@@ -26,7 +26,7 @@
 
 For `bash`, `zsh` and `fish` shells, there's an [automatic installation script](./.ci/install.sh).
 
-First ensure that `curl` and `unzip` are already installed on you operating system. Then execute:
+First ensure that `curl` and `unzip` are already installed on your operating system. Then execute:
 
 ```sh
 curl -fsSL https://fnm.vercel.app/install | bash