Specify Apache license version for Grisu2

COPYRIGHT.txt

@@ -309,7 +309,7 @@ Files: thirdparty/grisu2/*
 Comment: Grisu2 float serialization algorithm
 Copyright: 2009, Florian Loitsch
  2018-2023, The simdjson authors
-License: Expat and Apache
+License: Expat and Apache-2.0
 
 Files: thirdparty/harfbuzz/*
 Comment: HarfBuzz text shaping library