Merge branch '4.4' into 5.1

* 4.4:
  add a note about npm commands equivalent to yarn's

Author: javiereguiluz

frontend/encore/simple-example.rst

@@ -63,12 +63,18 @@ To build the assets, run:
 
     # compile assets once
     $ yarn encore dev
+    # if you prefer npm, run:
+    $ npm run dev
 
     # or, recompile assets automatically when files change
     $ yarn encore dev --watch
+    # if you prefer npm, run:
+    $ npm run watch
 
     # on deploy, create a production build
     $ yarn encore production
+    # if you prefer npm, run:
+    $ npm run build
 
 .. note::