[AppBarLayout] Fix spec link in Javadoc

PiperOrigin-RevId: 353032509

Author: dsn5ft

lib/java/com/google/android/material/appbar/AppBarLayout.java

@@ -124,8 +124,8 @@
  * </androidx.coordinatorlayout.widget.CoordinatorLayout>
  * </pre>
  *
- * @see <a href="http://www.google.com/design/spec/layout/structure.html#structure-app-bar">
- *     http://www.google.com/design/spec/layout/structure.html#structure-app-bar</a>
+ * @see <a href="https://material.io/components/app-bars-top#anatomy">
+ *     https://material.io/components/app-bars-top#anatomy</a>
  */
 public class AppBarLayout extends LinearLayout implements CoordinatorLayout.AttachedBehavior {