fix: Change from ? extends Component to ? for VS Code (#16884) (#16894)

* fix: Change from ? extends Component ? for VS Code

VS Code refuses to understand that a View which extends a Component can be used with the annotation when it is `Class<? extends Component>`. VS Code is broken here but this is a workaround to make VS Code work.

* add comment

Co-authored-by: Artur <artur@vaadin.com>

flow-server/src/main/java/com/vaadin/flow/server/LoadDependenciesOnStartup.java

@@ -51,10 +51,13 @@
     /**
      * The views for which to load dependencies when the application is opened
      * for the first time.
+     * <p>
+     * Note that all classes must extend {@link Component}. The the type is
+     * {@code Class<?>} because of a VS Code issue.
      *
      * @return a collection of views to load eagerly or an empty array to load
      *         all dependencies eagerly
      */
-    Class<? extends Component>[] value() default {};
+    Class<?>[] value() default {};
 
 }