test: accept React 17 SSR root marker

Author: thebuilder

src/__tests__/useInView.ssr.test.ts

@@ -11,8 +11,8 @@ test("useInView renders on the server without diagnostics", () => {
       return createElement("div", { ref }, String(inView));
     }
 
-    expect(renderToString(createElement(CompatibilityFixture))).toBe(
-      "<div>false</div>",
+    expect(renderToString(createElement(CompatibilityFixture))).toContain(
+      ">false</div>",
     );
     expect(consoleError).not.toHaveBeenCalled();
   } finally {