[Fix] Fix setr decode head typos. (open-mmlab#787)

Author: clownrat6

mmseg/models/decode_heads/setr_mla_head.py

@@ -11,7 +11,7 @@
 class SETRMLAHead(BaseDecodeHead):
     """Multi level feature aggretation head of SETR.
 
-    MLA head of `SETR  <https://arxiv.org/pdf/2012.15840.pdf>`.
+    MLA head of `SETR  <https://arxiv.org/pdf/2012.15840.pdf>`_.
 
     Args:
         mlahead_channels (int): Channels of conv-conv-4x of multi-level feature

mmseg/models/decode_heads/setr_up_head.py

@@ -10,7 +10,7 @@
 class SETRUPHead(BaseDecodeHead):
     """Naive upsampling head and Progressive upsampling head of SETR.
 
-    Naive or PUP head of `SETR  <https://arxiv.org/pdf/2012.15840.pdf>`.
+    Naive or PUP head of `SETR  <https://arxiv.org/pdf/2012.15840.pdf>`_.
 
     Args:
         norm_layer (dict): Config dict for input normalization.