Update README.md

Author: CodeAndWeb

README.md

@@ -3,7 +3,7 @@
 The internationalization (i18n) library for Angular.
 <br/>
 
-## Angular 16, 17, 18, 19+
+## Angular 16 - 20
 
 The new [documentation](https://ngx-translate.org/) now covers installation on
 Angular 16+ and is divided into smaller, more readable sections, making it
@@ -17,7 +17,7 @@ interfaces and explains how to develop custom plugins.
 In addition to that, a getting started tutorial is available here: 
 [How to Translate Your Angular App with NGX-Translate](https://www.codeandweb.com/babeledit/tutorials/how-to-translate-your-angular-app-with-ngx-translate)
 
-## Support
+## Support for older versions
 
 We only support the current version with new updates and fixes.