: update Taskfile for persistence course

use new course name

Taskfile.yaml

@@ -57,7 +57,7 @@ tasks:
       - w01-handcrafting/02-handcrafting.html
       - w02-modern-java/01-modern-java.html
       - w03-spring-boot/03-spring-boot.html
-      - w04-jpa/04-jpa.html
+      - w04-persistence/04-persistence.html
       - w05-gui/05-gui.html
       - w06-interoperability/06-interoperability.html
       - w07-security/07-security.html