[Santali - from sat_Olck to sat_Beng] Revert to old script code

The updated script code (Olck) is not working with the app (taking double time and is giving no input), maybe because of the old model used. I think by updating to newer model may solve this issue for Santali langauge. I have put an issue here: https://github.com/facebookresearch/flores/issues/52 and they also updated the script code here: https://github.com/facebookresearch/fairseq/pull/4576 . In order to work with this old model here, I have reverted the code from "sat_Olck" to "sat_Beng".

langs.py

@@ -148,7 +148,7 @@ LANGS = [
     "rus_Cyrl",
     "sag_Latn",
     "san_Deva",
-    "sat_Olck",
+    "sat_Beng",
     "scn_Latn",
     "shn_Mymr",
     "sin_Sinh",