[doc] Improve encoder linkage to base class

doc/extras.inv

@@ -2,5 +2,4 @@
 # Project: extras
 # Version: stable
 # The remainder of this file is compressed using zlib.
-xEA0;Wbq
(ĖmS*Yg󛌸EZ-2T^%dw
@#GAcZTiEt=qI
-9ȊǷݱi>T>
+xM=0ཧk!,4
MPGA*'MUfY~!IF
I䩋0;3uJc	8%uD@fYv0Ng'FӺ>lR&Ey]/ea4_
ͬ+|Q㤪R:;ma,
\ No newline at end of file

doc/extras.txt

@@ -4,3 +4,4 @@
 # The remainder of this file is compressed using zlib.
 torchvision.transforms py:module 1 https://pytorch.org/vision/stable/transforms.html -
 optimizer_step py:method 1 api/lightning.pytorch.core.LightningModule.html#$ -
+json.encoder.JSONEncoder py:class 1 https://docs.python.org/3/library/json.html#json.JSONEncoder -

doc/nitpick-exceptions.txt

 py:class torch.nn.modules.loss._Loss
 py:class Module
-py:class json.encoder.JSONEncoder