Update config.mjs

Author: oblomov-dev

docs/.vitepress/config.mjs

@@ -162,8 +162,8 @@ export default defineConfig({
             { text: 'abapmerge', link: '/advanced/tools/abapmerge' },
           ]
           },
-           { text: 'Technical Background',  collapsed : "true" , items: [
            { text: 'test',  collapsed : "true" , items: [
+           { text: 'Technical Background',  collapsed : "true" , items: [
              { text: 'Key Concept', link: '/advanced/technical/concept' },
              { text: 'Architecture', link: '/advanced/technical/domain' },
              { text: 'Development Experience', link: '/advanced/technical/dx' },