Change Nushell section again

I get this weird error on the linter tests:

README.md:245:81 MD013/line-length Line length [Expected: 80; Actual: 110]

Therefore I had to separate the text into two lines.

README.md

@@ -242,7 +242,8 @@ zoxide can be installed in 4 easy steps:
    <details>
    <summary>Nushell</summary>
 
-   > Add this to the <ins>**end**</ins> of your config file (find it by running `$nu.config-path` in Nushell):
+   > Add this to the <ins>**end**</ins> of your config file.
+   > Find it by running `$nu.config-path` in Nushell:
    >
    > ```sh
    > zoxide init nushell | save -f ($nu.user-autoload-dirs.0)/zoxide.nu