Restore mock after use

Author: AugustinLF

src/__tests__/byText.test.js

@@ -142,6 +142,7 @@ describe('findBy options deprecations', () => {
     expect(warnSpy).toHaveBeenCalledWith(
       expect.stringContaining('Use of option "timeout"')
     );
+    warnSpy.mockRestore();
   }, 20000);
 });