Add Contributors

lang/Community_made_translations.md

@@ -3,6 +3,6 @@
 - **Dutch / Nederlands**
   - Maintainers: **@3d-gussner** and **@vintagepc**
   - Co-maintainers: 
-  - Contributors: 
+  - Contributors: **@stelgenhof**
   - [X] **Active**      since March 2021
   - [X] **Maintained**  since September 2019