Update release list test

Author: GuillaumeGomez

src/web/rustdoc.rs

@@ -2242,7 +2242,7 @@ mod test {
             // test rustdoc pages stay on the documentation
             let page = kuchiki::parse_html().one(
                 env.frontend()
-                    .get("/hexponent/0.3.0/hexponent/")
+                    .get("/hexponent/releases")
                     .send()?
                     .text()?,
             );