Fix 404.html page and link in the card (#3545)

Author: svekars

.ci/docker/requirements.txt

@@ -16,7 +16,7 @@ pandocfilters==1.5.1
 markdown==3.8.2
 
 # PyTorch Theme
--e git+https://github.com/pytorch/pytorch_sphinx_theme.git@23a72fbf4eb9cbcb7697a71d1889da4d7c10a4f7#egg=pytorch_sphinx_theme2
+-e git+https://github.com/pytorch/pytorch_sphinx_theme.git@b39e3e1e800132815a6187bf4f7bf545a2e9d8a9#egg=pytorch_sphinx_theme2
 
 # Tutorial dependencies
 tqdm==4.66.1

conf.py

@@ -158,9 +158,7 @@ def wrapper(*args, **kwargs):
     "author": "PyTorch Contributors",
 }
 
-html_additional_pages = {
-    "404": "404.html",
-}
+
 
 # -- Sphinx-gallery configuration --------------------------------------------
 
@@ -191,6 +189,11 @@ def wrapper(*args, **kwargs):
     },
 }
 
+html_additional_pages = {
+    "404": "404.html",
+}
+
+
 html_baseurl = "https://pytorch.org/tutorials/"  # needed for sphinx-sitemap
 sitemap_locales = [None]
 sitemap_excludes = [

recipes_index.rst

@@ -34,7 +34,7 @@ from our full-length tutorials.
    :header: Defining a Neural Network
    :card_description: Learn how to use PyTorch's torch.nn package to create and define a neural network for the MNIST dataset.
    :image: _static/img/thumbnails/cropped/defining-a-network.PNG
-   :link: recipesrecipes/defining_a_neural_network.html
+   :link: recipes/recipes/defining_a_neural_network.html
    :tags: Basics
 
 .. customcarditem::