fix: test error

Author: ChengShi-1

tests/component/sections/layout/footer/Footer.spec.tsx

@@ -25,6 +25,7 @@ describe('Footer component', () => {
 
   it('should call dataverseInfoRepository.getVersion on mount', () => {
     const dataverseInfoRepository = new DataverseInfoMockRepository()
+    sandbox.spy(dataverseInfoRepository, 'getVersion')
 
     cy.customMount(<Footer dataverseInfoRepository={dataverseInfoRepository} />)