docs: docs for next release (#13621)

* docs: docs for next release

* changes to opentelemetry dependencies

* document plugin env variables

* document admin changes

* fix vale error

* add version notes

* document campaign budget updates

* document campaign changes in user guide

* document chages in cluster mode cli

* documented once promotion allocation

* document multiple API keys support

www/apps/resources/generated/generated-commerce-modules-sidebar.mjs

@@ -6419,6 +6419,14 @@ const generatedgeneratedCommerceModulesSidebarSidebar = {
               "path": "https://docs.medusajs.com/user-guide/orders/returns",
               "children": []
             },
+            {
+              "loaded": true,
+              "isPathHref": true,
+              "type": "ref",
+              "title": "Manage Refund Reasons",
+              "path": "https://docs.medusajs.com/user-guide/settings/refund-reasons",
+              "children": []
+            },
             {
               "loaded": true,
               "isPathHref": true,