Remove act warnings from grant-explorer test output

[bard]

Example:

Warning: An update to RoundProvider inside a test was not wrapped in act(...).

When testing, code that causes React state updates should be wrapped into act(...):

act(() => {
  /* fire events that update state */
});
/* assert on the output */

This ensures that you're testing the behavior the user would see in the browser. Learn more at https://reactjs.org/link/wrap-tests-with-act
    at RoundProvider (/home/bard/projects/gitcoin/grants-stack/packages/grant-explorer/src/context/RoundContext.tsx:52:26)
    at DataLayerProvider (/home/bard/projects/gitcoin/grants-stack/packages/data-layer/dist/react.js:7:30)