Add canonical URL to configuration (#3573)

Author: svekars

conf.py

@@ -145,7 +145,7 @@ def wrapper(*args, **kwargs):
 
 intersphinx_mapping = {
     "torch": ("https://docs.pytorch.org/docs/stable/", None),
-    "tensordict": ("https://docs.pytorch.github.io/tensordict/stable", None),
+    "tensordict": ("https://docs.pytorch.org/tensordict/stable", None),
     "torchrl": ("https://docs.pytorch.org/rl/stable", None),
     "torchaudio": ("https://docs.pytorch.org/audio/stable/", None),
     "torchtext": ("https://docs.pytorch.org/text/stable/", None),
@@ -236,6 +236,7 @@ def wrapper(*args, **kwargs):
     "navbar_center": "navbar-nav",
     "display_version": True,
     "pytorch_project": "tutorials",
+    "canonical_url": "https://docs.pytorch.org/tutorials/",
 }
 
 theme_variables = pytorch_sphinx_theme2.get_theme_variables()