Issue #3479151 by jurgenhaas: Allow for book version 2.0 too

composer.json

@@ -21,6 +21,6 @@
   },
   "require": {
     "php": ">=8.1",
-    "drupal/book": "^1.0"
+    "drupal/book": "^1.0 || ^2.0"
   }
 }