adding javalin-htmx examples to server integration examples (#3104)

* adding javalin-htmx examples to server integration examples

Adding two examples of using htmx with the javalin server library

* Update www/content/server-examples.md

Co-authored-by: Vincent <vichenzo-thebaud@hotmail.com>

---------

Co-authored-by: Vincent <vichenzo-thebaud@hotmail.com>

Author: ludicrousdisplay

www/content/server-examples.md

@@ -63,6 +63,11 @@ These examples may make it a bit easier to get started using htmx with your plat
 
 ## Java
 
+### Javalin
+
+- <https://github.com/AussieGuy0/java-htmx-todo/>
+- <https://github.com/erwindrsno/simple-to-do-list>
+
 ### Spring Boot
 
 - <https://github.com/wiverson/htmx-demo>