deactivate VPN due to issues while Rendering

Reviewed-by: Gode, Sebastian <sebastian.gode@t-systems.com>
Co-authored-by: tischrei <tino.schreiber@t-systems.com>
Co-committed-by: tischrei <tino.schreiber@t-systems.com>

otc_metadata/data/services.yaml

@@ -1999,7 +1999,7 @@ services:
     service_category: network
     service_title: Virtual Private Network
     service_type: vpn
-    service_uri: virtual-private-network
+    service_uri: virtual-private-network/umn/
     environment: public
     teams:
       - name: docs-network-rw