ufbx: Update to 0.20.0

Author: Chubercik

thirdparty/README.md

@@ -1026,7 +1026,7 @@ Patches:
 ## ufbx
 
 - Upstream: https://github.com/ufbx/ufbx
-- Version: 0.18.2 (5b5494b9b6c2cdb0fc0ae873bdbf8718cdeb85af, 2025)
+- Version: 0.20.0 (a63ff0a47485328880b3300e7bcdf01413343a45, 2025)
 - License: MIT
 
 Files extracted from upstream source: