chore: update theming openAPI exports

Signed-off-by: Julius Knorr <jus@bitgrid.net>

Author: juliusknorr

apps/theming/openapi.json

@@ -79,6 +79,7 @@
                         "type": "object",
                         "required": [
                             "name",
+                            "productName",
                             "url",
                             "slogan",
                             "color",
@@ -98,6 +99,9 @@
                             "name": {
                                 "type": "string"
                             },
+                            "productName": {
+                                "type": "string"
+                            },
                             "url": {
                                 "type": "string"
                             },