Added the training registration link.

README.md

@@ -16,7 +16,7 @@ $ poetry install
 You can directly push your changes, but it is preferable to first check locally:
 
 ```bash
-$ poetry shell # you can also use pipenv shell
+$  # you can also use pipenv shell
 # generation of the static website:
 $ make html
 # or test with the development server:

content/pages/trainings.md

@@ -35,7 +35,17 @@ table {
 | |  |  |
 |**Registration** | ||
 
-Is going to be available 1 month before the event (by the end of August).
+<link rel="stylesheet" type="text/css" href="https://pretix.eu/monarc/training-2024-en/widget/v1.css" crossorigin>
+<script type="text/javascript" src="https://pretix.eu/widget/v1.en.js" async crossorigin></script>
+
+<pretix-widget event="https://pretix.eu/monarc/training-2024-en/" single-item-select="button"></pretix-widget>
+<noscript>
+   <div class="pretix-widget">
+        <div class="pretix-widget-info-message">
+            JavaScript is disabled in your browser. To access our ticket shop without JavaScript, please <a target="_blank" rel="noopener" href="https://pretix.eu/monarc/training-2024-en/">click here</a>.
+        </div>
+    </div>
+</noscript>
 
 
 ### Past Trainings