Remove outdated Google Docs link from compiled_autograd_tutorial

The tutorial was pointing to a Google Docs page that is no longer
maintained and not well indexed. Many of the restrictions mentioned
in that document have since been lifted.

Changes:
- Removed the Google Docs link reference
- Updated the note to reflect that many restrictions have been lifted
- Added a link to PyTorch GitHub Issues for reporting problems
- Made the note more user-friendly and actionable

This makes the tutorial more discoverable and directs users to the
proper channels for reporting issues or asking questions.

Author: patrocinio

intermediate_source/compiled_autograd_tutorial.rst

@@ -37,7 +37,7 @@ However, Compiled Autograd introduces its own limitations:
 * Added runtime overhead at the start of the backward for cache lookup
 * More prone to recompiles and graph breaks in dynamo due to the larger capture
 
-.. note:: Compiled Autograd is under active development and is not yet compatible with all existing PyTorch features. For the latest status on a particular feature, refer to `Compiled Autograd Landing Page <https://docs.google.com/document/d/11VucFBEewzqgkABIjebZIzMvrXr3BtcY1aGKpX61pJY>`_.
+.. note:: Compiled Autograd is under active development. While many restrictions have been lifted since its initial release, some features may still be evolving. If you encounter issues or have questions, please report them on the `PyTorch GitHub Issues <https://github.com/pytorch/pytorch/issues>`_ page.
 
 Setup
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