Add test assertion I missed

Author: captbaritone

packages/react-dom/src/__tests__/ReactDOMServerPartialHydrationActivity-test.internal.js

@@ -1883,7 +1883,7 @@ describe('ReactDOMServerPartialHydrationActivity', () => {
       assertConsoleErrorDev([
         "Can't perform a React state update on a component that hasn't mounted yet. " +
           'This indicates that you have a side-effect in your render function that ' +
-          'asynchronously later calls tries to update the component. Move this work to useEffect instead.\n' +
+          'asynchronously later tries to update the component. Move this work to useEffect instead.\n' +
           '    in App (at **)',
       ]);