docs(*): update LTS information in README.md and docs landing page

Closes #16688

Author: sibiraj-s

README.md

@@ -14,9 +14,9 @@ piece of cake. Best of all? It makes development fun!
 
 --------------------
 
-##### AngularJS will be moving to Long Term Support (LTS) mode on July 1st 2018: [Find out more](https://docs.angularjs.org/misc/version-support-status)
+**On July 1, 2018 AngularJS entered a 3 year Long Term Support period:** [Find out more](https://docs.angularjs.org/misc/version-support-status)
 
-##### Looking for the new Angular? Go here: https://github.com/angular/angular
+**Looking for the new Angular? Go here:** https://github.com/angular/angular
 
 --------------------
 

docs/content/api/index.ngdoc

@@ -5,7 +5,7 @@
 # AngularJS API Docs
 
 <div class="alert alert-warning">
-**AngularJS will be moving to Long Term Support (LTS) mode on July 1st 2018.**: [Find out more](misc/version-support-status).
+**On July 1, 2018 AngularJS entered a 3 year Long Term Support period:** [Find out more](misc/version-support-status).
 </div>
 
 ## Welcome to the AngularJS API docs page.