Use https when possible. (#2733)

docs/components/main-header.md

@@ -4,7 +4,7 @@ title: Main Header Component
 ---
 
 > ##### Reminder!
-> AdminLTE uses all of Bootstrap 4 components. It's a good start to review the [Bootstrap documentation](http://getbootstrap.com) to get an idea of the various components that this documentation __does not__ cover.
+> AdminLTE uses all of Bootstrap 4 components. It's a good start to review the [Bootstrap documentation](https://getbootstrap.com/) to get an idea of the various components that this documentation __does not__ cover.
 {: .quote-orange .mt-0}
 
 

docs/dependencies.md

@@ -27,7 +27,7 @@ AdminLTE makes use of the following plugins. For documentation, updates or licen
   <div class="col-sm-3">
     <ul class="list-unstyled">
       <li><h4>Charts</h4></li>
-      <li><a href="http://www.chartjs.org/" target="_blank">ChartJS</a></li>
+      <li><a href="https://www.chartjs.org/" target="_blank">ChartJS</a></li>
       <li><a href="http://www.flotcharts.org/" target="_blank">Flot</a></li>
       <li><a href="https://github.com/mariusGundersen/sparkline" target="_blank">Sparkline</a></li>
     </ul>

docs/faq.md

@@ -11,5 +11,5 @@ Short answer, no. However, there are forks and tutorials around the web that pro
 
 <!---
 #### How do I get notified of new AdminLTE versions?
-The best option is to subscribe to our mailing list using the [subscription form on Almsaeed Studio](http://almsaeedstudio.com/#subscribe). If that's not appealing to you, you may watch the [repository on GitHub](https://github.com/almasaeed2010/AdminLTE) or visit [Almsaeed Studio](http://almsaeedstudio.com) every now and then for updates and announcements.
+The best option is to subscribe to our mailing list using the [subscription form on Almsaeed Studio](https://almsaeedstudio.com/#subscribe). If that's not appealing to you, you may watch the [repository on GitHub](https://github.com/almasaeed2010/AdminLTE) or visit [Almsaeed Studio](https://almsaeedstudio.com) every now and then for updates and announcements.
 --->

docs/license.md

@@ -3,7 +3,7 @@ layout: page
 title: License
 ---
 
-AdminLTE is an open source project that is licensed under the [MIT license](http://opensource.org/licenses/MIT). This allows you to do pretty much anything you want as long as you include the copyright in "all copies or substantial portions of the Software." Attribution is not required (though very much appreciated).
+AdminLTE is an open source project that is licensed under the [MIT license](https://opensource.org/licenses/MIT). This allows you to do pretty much anything you want as long as you include the copyright in "all copies or substantial portions of the Software." Attribution is not required (though very much appreciated).
 
 <h5 class="text-bold text-dark mt-3">What You Are <span class="text-success">Allowed</span> To Do With AdminLTE</h5>
 - Use in commercial projects.