chore: update mcp test expectations after #37583 (#37904)

Author: yury-s

tests/mcp/generator.spec.ts

@@ -41,6 +41,7 @@ test('generator tools intent', async ({ startClient }) => {
     'browser_type',
     'browser_navigate',
     'browser_navigate_back',
+    'browser_set_headers',
     'browser_mouse_move_xy',
     'browser_mouse_click_xy',
     'browser_mouse_drag_xy',