docs: use npm install --location=global and remove --defaults

Author: JohannesHoppe

README.md

@@ -62,8 +62,8 @@ If you already have an existing Angular project on GitHub, skip step 1 and 2.
    and create a new Angular project.
 
    ```sh
-   npm install -g @angular/cli
-   ng new your-angular-project --defaults
+   npm install --location=global @angular/cli
+   ng new your-angular-project
    cd your-angular-project
    ```
 

docs/README_contributors.md

@@ -44,10 +44,10 @@ Execute the next three steps to update your test project to the latest Angular v
 1. Install the latest version of the Angular CLI.
 
    ```sh
-   npm install -g @angular/cli
+   npm install --location=global @angular/cli
    ```
 
-2. Run `ng version`, to make sure you have installed Angular v18 or greater.
+2. Run `ng version` to make sure you have installed Angular v18 or greater.
 
 3. Update your existing project using the command: