fix: JWT kid/jku lessons (#1949)

* refactor: rewrite hints

Use active voice and fix grammar issues.

* fix: use Thymeleaf `th:action`

* fix: JWT kid/jku lessons

Split the JavaScript into two files they pointed to the same URL

The JWTs are now valid, they parse successfully.

The paths now include `/kid` and `/jku` to make sure the hints match accordingly in the UI. Otherwise `/delete` would pick up both hints from both assignments as the paths overlap.

Closes: #1715

* fix: update to latest pre-commit version

* fix: increase timeouts for server to start during integration tests

src/main/resources/lessons/htmltampering/html/HtmlTampering.html

@@ -13,7 +13,7 @@
         <div class="assignment-success"><i class="fa fa-2 fa-check hidden" aria-hidden="true"></i></div>
         <form class="attack-form" accept-charset="UNKNOWN" id="task" name="task"
               method="POST"
-              action="HtmlTampering/task">
+              th:action="@{/HtmlTampering/task}">
             <script>
                 var regex = /^2999.99$/;
                 var price = 2999.99;