Consistency in asset config examples

Author: GromNaN

reference/configuration/framework.rst

@@ -2112,7 +2112,7 @@ package:
                     <framework:package
                         name="foo_package"
                         json-manifest-path="%kernel.project_dir%/public/build/a_different_manifest.json"
-                        strict="true"/>
+                        strict="%kernel.debug%"/>
                     <!-- this package uses the global manifest (the default file is used) -->
                     <framework:package
                         name="bar_package"