Update README.md

Author: jhades

Diff for: README.md

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 This repository contains the code of the [Angular Core Deep Dive](https://angular-university.io/course/angular-course).
 
-This course repository is updated to Angular v10, and there is a  package-lock.json file available, for avoiding semantic versioning installation issues.
+This course repository is updated to Angular v11:
 
 ![Angular Core Deep Dive](https://s3-us-west-1.amazonaws.com/angular-university/course-images/angular-core-in-depth-small.png)
 
 
 # Installation pre-requisites
 
-IMPORTANT: Please use the latest Node and especially NPM, to make sure the package-lock.json is used.
-
-For running this project we need and npm installed on our machine. These are some tutorials to install node in different operating systems:
-
-*Its important to install the latest version of Node*
-
-- [Install Node and NPM on Windows](https://www.youtube.com/watch?v=8ODS6RM6x7g)
-- [Install Node and NPM on Linux](https://www.youtube.com/watch?v=yUdHk-Dk_BY)
-- [Install Node and NPM on Mac](https://www.youtube.com/watch?v=Imj8PgG3bZU)
-
+IMPORTANT: Please use Node 14 (Long Term Support version).
 
 # Installing the Angular CLI