Fix the special token mapping (#20)

- Fix the special token mapping (67dc7e41b29aeb56be9f5e0320f338707e332b16)


Co-authored-by: null <[email protected]>

special_tokens_map.json

@@ -1,6 +1,6 @@
 {
-  "bos_token": "</s>",
+  "bos_token": "<s>",
   "eos_token": "</s>",
   "pad_token": "[PAD]",
-  "unk_token": "</s>"
+  "unk_token": "<unk>"
 }