add confirmation button to anonymize report action

scipost_django/submissions/templates/submissions/_report_public_without_comments.html

@@ -54,7 +54,11 @@
 	  {% endif %}
     {% else %}
       {% if user|is_in_group:'Editorial Administrators' and not user|is_possible_author_of_submission:submission %}
-        <button class="btn btn-sm btn-danger text-white my-2" hx-get="{% url "submissions:_hx_anonymize_report" report_id=report.id %}" hx-target="#report_{{report.report_nr}}" hx-swap="outerHTML">
+        <button class="btn btn-sm btn-danger text-white my-2" 
+              hx-get="{% url "submissions:_hx_anonymize_report" report_id=report.id %}" 
+              hx-target="#report_{{report.report_nr}}" 
+              hx-swap="outerHTML"
+              hx-confirm="Are you sure you want to anonymize this report?">
           Anonymize this report
         </button>
       {% endif %}