[Update] Update ABINet links for main (#1221)

* loss

* fix

* fix bug

* update ABINet links

mmocr/models/textrecog/decoders/abinet_language_decoder.py

@@ -15,7 +15,7 @@ from .base_decoder import BaseDecoder
 class ABILanguageDecoder(BaseDecoder):
     r"""Transformer-based language model responsible for spell correction.
     Implementation of language model of \
-        `ABINet <https://arxiv.org/abs/1910.04396>`_.
+        `ABINet <https://arxiv.org/pdf/2103.06495>`_.
 
     Args:
         d_model (int): Hidden size of input.

mmocr/models/textrecog/decoders/abinet_vision_decoder.py

@@ -13,7 +13,7 @@ class ABIVisionDecoder(BaseDecoder):
     """Converts visual features into text characters.
 
     Implementation of VisionEncoder in
-        `ABINet <https://arxiv.org/abs/1910.04396>`_.
+        `ABINet <https://arxiv.org/pdf/2103.06495>`_.
 
     Args:
         in_channels (int): Number of channels :math:`E` of input vector.