The 2.4 release notes at https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-2.4-Release-Notes#register-weblisteners-in-a-way-that-allows-them-to-register-servlets-and-filters have:
Servlet @WebLister classes are now registered in such...
Should be:
Servlet @WebListener classes are now registered in such...
Comment From: wilkinsona
Thanks, @wimdeblauwe. I've corrected the typo.