EGON document fix

* fixes bug where documents have not been serialized properly into a single xml list

intervention/utils/egon_export.py

@@ -146,17 +146,17 @@ class EgonGmlBuilder:
 
     def _gen_foto(self):
         revoc_docs, regular_docs = self.intervention.get_documents()
-        docs_list = [
+        docs_list = {
+            "oneo:Foto": [
                 {
-                "oneo:Foto": {
                     "oneo:aufnahmezeitpunkt": doc.date_of_creation.strftime(DEFAULT_DATE_FORMAT),
                     "oneo:bemerkung": doc.comment,
                     "oneo:fotoverweis": base64.b64encode(doc.file.read()).decode("utf-8"),
                     "oneo:dateiname": doc.file.url.split("/")[-1],
                     "oneo:hauptfoto": False,
-                }
                 } for doc in regular_docs
             ]
+        }
         return docs_list
 
     def build_gml(self):