docs: move HTTP Connector to same level as RFC Connector

Author: claude

docs/.vitepress/config.mjs

@@ -256,14 +256,8 @@ export default defineConfig({
           { text: "Renaming", link: "/advanced/renaming" },
           { text: "Builder", link: "/advanced/builds" },
           { text: "Local", link: "/advanced/local" },
-          {
-            text: "RFC Connector",
-            link: "/advanced/rfc",
-            collapsed: true,
-            items: [
-              { text: "HTTP Connector", link: "/advanced/http" },
-            ],
-          },
+          { text: "RFC Connector", link: "/advanced/rfc" },
+          { text: "HTTP Connector", link: "/advanced/http" },
           { text: "Fiori Elements Integration", link: "/advanced/fiori" },
           {
             text: "Extensibility",