Update pattern-scaffolding.css

Author: mfranzke

source/css/pattern-scaffolding.css

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2025 DB Systel GmbH
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 /**
  * This stylesheet is for styles you want to include only when displaying demo
  * styles for grids, animations, color swatches, etc.