Merge pull request #5263 from mailcow:update-api

[API] Update swagger version to 5.1.0

data/web/api/openapi.yaml

@@ -1,4 +1,4 @@
-openapi: 3.0.0
+openapi: 3.1.0
 info:
   description: >-
     mailcow is complete e-mailing solution with advanced antispam, antivirus,

data/web/api/swagger-initializer.js

@@ -1,6 +1,6 @@
 window.onload = function() {
   // Begin Swagger UI call region
-  const ui = SwaggerUIBundle({
+  window.ui = SwaggerUIBundle({
     urls: [{url: "/api/openapi.yaml", name: "mailcow API"}],
     dom_id: '#swagger-ui',
     deepLinking: true,
@@ -15,5 +15,4 @@ window.onload = function() {
   });
   // End Swagger UI call region
 
-  window.ui = ui;
 };