update third party licenses

Author: codeloop

THIRD_PARTY_LICENSES.txt

@@ -453,6 +453,12 @@ mlforecast
 * Source code: https://github.com/Nixtla/mlforecast
 * Project home: https://github.com/Nixtla/mlforecast
 
+rrcf
+* Copyright 2018 kLabUM
+* License: MIT License
+* Source code: https://github.com/kLabUM/rrcf
+* Project home: https://github.com/kLabUM/rrcf
+
 =======
 =============================== Licenses ===============================
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