fix: replace old book url by new url

Author: SergioRibera

src/components/esta_semana_en_rust/header.rs

@@ -37,7 +37,7 @@ pub fn Header() -> impl IntoView {
                     <ul class="flex items-center gap-6 flex-col lg:flex-row lg:items-center ">
 
                         <li class="nav-item">
-                            <a href="https://rustlang-es.org/rust-book-es" target="_blank">
+                            <a href="https://book.rustlang-es.org" target="_blank">
                                 "El libro"
                             </a>
                         </li>

src/components/header.rs

@@ -31,7 +31,7 @@ pub fn Header() -> impl IntoView {
 
                     <ul class="flex items-center gap-6 flex-col lg:flex-row lg:items-center">
                         <li class="nav-item">
-                            <a href="https://rustlang-es.org/rust-book-es" target="_blank">
+                            <a href="https://book.rustlang-es.org" target="_blank">
                                 "El libro"
                             </a>
                         </li>