Add HG Do September and achievement

Author: madmas

events.json

@@ -161,6 +161,23 @@
             }
         ],
         "achievements": []
+    },
+     {
+        "date": "2025-09-04",
+        "venue": "Karakun @ Digitale Werkbank Dortmund",
+        "address": "Kanalstr. 25, 44147 Dortmund",
+        "links": [
+            {
+                "title": "Meetup",
+                "url": "https://www.meetup.com/hackergarten-dortmund/events/310484088/"
+            }
+        ],
+        "achievements": [
+            {
+                "title": "Upgrade @nativescipt/pdf library",
+                "url": "https://github.com/NativeScript/plugins/pull/645"
+            }
+        ]
     },
     {
         "date": "2025-09-04",