Remove .dev from transformers version

config.json

@@ -22,7 +22,7 @@
   "seq_length": 4096,
   "skip_bias_add": true,
   "skip_bias_add_qkv": false,
-  "transformers_version": "4.20.0.dev0",
+  "transformers_version": "4.20.0",
   "use_cache": true,
   "vocab_size": 250880
 }