docs: update config --location desc (#659)

* docs: update config `--location` desc

* Update docs/cli/config.md

Co-authored-by: Mike McCready <[email protected]>

---------

Co-authored-by: Mike McCready <[email protected]>

Author: btea

docs/cli/config.md

@@ -44,7 +44,7 @@ Set the configuration in the global config file.
 
 ### --location
 
-When set to `project`, the `.npmrc` file at the nearest `package.json` will be used.
+When set to `project`, the `.npmrc` file at the nearest `package.json` will be used. If no `.npmrc` file is present in the directory, the setting will be written to a `pnpm-workspace.yaml` file.
 
 When set to `global`, the performance is the same as setting the `--global` option.