docs: update README with latest instructions

Author: Sara Dahan

elements/pf-label-group/README.md

@@ -1,11 +1,30 @@
 # Label Group
-# <pf-label-group>
-
-A **label group** is a collection of labels that can be grouped by category and used to represent one or more values assigned to a single attribute.  
+A label group is a collection of labels that can be grouped by category and used to represent one or more values assigned to a single attribute.  
 When the number of labels exceeds `numLabels`, additional labels are hidden under an overflow label.
 
+## Installation
+
+Load `<pf-label-group>` via CDN:
+
+```html
+<script src="https://jspm.dev/@patternfly/elements/pf-label-group/pf-label-group.js"></script>
+```
+
+Or, if you are using [NPM](https://npm.im), install it
+
+```bash
+npm install @patternfly/elements
+```
+
+Then once installed, import it to your application:
+
+```js
+import '@patternfly/elements/pf-label-group/pf-label-group.js';
+```
+
 ---
-##  Usage
+
+## Usage
 
 ```html
 <pf-label-group num-labels="2">