fix(cases): um só convite ao WhatsApp no fim do case e testes alinhados

app/cases/[slug]/opengraph-image.paths.test.tsx

@@ -45,12 +45,6 @@ afterEach(() => {
   mockedReadProjectOgImage.mockImplementation(actualReadProjectOgImage);
 });
 
-jest.mock("next/navigation", () => ({
-  notFound: jest.fn(() => {
-    throw new Error("NEXT_NOT_FOUND");
-  }),
-}));
-
 jest.mock("next/og", () => ({ ImageResponse: jest.fn() }));
 
 const mockedImageResponse = jest.mocked(ImageResponse);