message: packages/core-api: use fragment instead of div to wrap app route
diff: @@ -207,10 +207,7 @@ export class PrivateAppImpl implements BackstageApp {
  <AppThemeProvider>
  <Router>
  <Routes>
  - <Route
  - path={`${pathname}/*`}
  - element={<div>{children}</div>}
  - />
  + <Route path={`${pathname}/*`} element={<>{children}</>} />
  </Routes>
  </Router>
  </AppThemeProvider>
  