feat: update wording

templates/booking/_modal_end_series.html.twig

@@ -1,12 +1,12 @@
 {% extends 'htmx_confirmation_modal.html.twig' %}
 
-{% block title %}Serie beenden?{% endblock %}
+{% block title %}Wiederholung beenden?{% endblock %}
 
 {% block content %}
     <p>
         {{ series.resource.label }} · {{ series.describe }}
         {% if series.user.id != app.user.id %}
-            — Serie von <em>{{ series.user.name }}</em>
+            — Wiederkehrende Buchung von <em>{{ series.user.name }}</em>
         {% endif %}
     </p>
     <p class="pt-3 text-sm text-gray-500">
@@ -14,4 +14,4 @@
     </p>
 {% endblock %}
 
-{% block button_confirm %}Serie beenden{% endblock %}
+{% block button_confirm %}Wiederholung beenden{% endblock %}