chore: add BSD-2-Clause to cargo deny allow list

Author: Boshen

deny.toml

@@ -93,8 +93,8 @@ ignore = [
 allow = [
   "MIT",
   "Apache-2.0",
-  "Unicode-DFS-2016",
   "Unicode-3.0",
+  "BSD-2-Clause",
   # "Apache-2.0 WITH LLVM-exception",
 ]
 # The confidence threshold for detecting a license from license text.