update openapi specs

Author: bisgaard-itis

services/api-server/openapi.json

@@ -5548,6 +5548,7 @@
           "urls": {
             "items": {
               "type": "string",
+              "minLength": 1,
               "format": "uri"
             },
             "type": "array",
@@ -6161,6 +6162,7 @@
           },
           "download_link": {
             "type": "string",
+            "minLength": 1,
             "format": "uri",
             "title": "Download Link"
           }