message: feat(readme): updated readme
diff: <p align="center">
  The best way to quickly integrate <a href="https://getbootstrap.com/docs/5.2">Bootstrap 5</a> <a href="https://getbootstrap.com/docs/4.0">Bootstrap 4</a> Components with <a href="https://angular.io/">Angular</a>
  -The best way to quickly integrate <a href="https://getbootstrap.com/docs/5.2">Bootstrap 5</a>,
  -<a href="https://getbootstrap.com/docs/4.0">Bootstrap 4</a> components with <a href="https://angular.io/">Angular</a>
  <br/>
  <br/>
  <i><strong>Note: </strong>ngx-bootstrap for <a href="https://getbootstrap.com/docs/3.3/">Bootstrap 3</a> is still available but is no longer maintained or updated.</i>
  