Fix link (#899)

Summary: Pull Request resolved: #899

Reviewed By: svekars

Differential Revision: D50275018

fbshipit-source-id: 1dfe3b9a8a31eba51a04c82c1aecf99a03509710

Author: angelayi

docs/source/tutorials_source/export-to-executorch-tutorial.py

@@ -105,7 +105,7 @@ def forward(self, x: torch.Tensor) -> torch.Tensor:
 # - The graph is purely functional, meaning it does not contain operations with
 #   side effects such as mutations or aliasing.
 # - The graph contains only a small defined
-#   `Core ATen IR <https://pytorch.org/docs/stable/ir.html#core-aten-ir>`__
+#   `Core ATen IR <https://pytorch.org/docs/stable/torch.compiler_ir.html#core-aten-ir>`__
 #   operator set (~180 ops), along with registered custom operators.
 # - The nodes in the graph contain metadata captured during tracing, such as a
 #   stacktrace from user's code.