Nicer syntax highlighting

README.md

@@ -209,7 +209,9 @@ If not otherwise stated, all sub-projects are dual-licensed under a
 2-clause BSD-style license and/or the LPPL version 1.3c or (at your
 opinion) any later version.
 
+```yaml
 SPDX-License-Identifier: LPPL-1.3c+ OR BSD-2-Clause
+```
 
 ## Master Repository