fixed ng readme

Author: adumesny

angular/README.md

@@ -162,7 +162,7 @@ public identify(index: number, w: GridStackWidget) {
 
 You can see a fuller example at [app.component.ts](projects/demo/src/app/app.component.ts)
 
-to build the demo, go to [angular/projects/demo](projects/demo/) and run `yarn` + `yarn upgrade` (ng18 seem to have introduced some conflicts) + `yarn start` and navigate to `http://localhost:4200/`
+to build the demo, go to [angular/projects/demo](projects/demo/) and run `yarn` + `yarn start` and navigate to `http://localhost:4200/`
 
 Code started shipping with v8.1.2+ in `dist/angular` for people to use directly and is an angular module! (source code under `dist/angular/src`)