Update licenses in README

Author: robinheidrich

README.rst

@@ -160,10 +160,9 @@ The website generator is licensed under GNU GPL version 2 or later.
 
 Website itself uses some MIT licensed frontend libraries:
 
-* `jQuery <https://jquery.com/>`_
 * `Bootstrap 5 <https://getbootstrap.com>`_
 * `Bootstrap Icons <https://icons.getbootstrap.com>`_
-* `Colorbox <https://www.jacklmoore.com/colorbox/>`_
+* `bs5-lightbox <https://trvswgnr.github.io/bs5-lightbox/>`_
 
 The website content is licensed under Creative Commons
 Attribution-Noncommercial-Share Alike 3.0 Unported License.