update aotinductor doc for XPU support (pytorch#149299)

as title. Since the AOTInductor feature starting from 2.7 works on Intel GPU, add the related contents into its doc.
Pull Request resolved: pytorch#149299
Approved by: https://github.com/guangyey, https://github.com/desertfire

Author: jingxu10

docs/source/torch.compiler_aot_inductor.rst

@@ -38,7 +38,8 @@ package.
    the following code will compile the model into a shared library for CUDA execution.
    Otherwise, the compiled artifact will run on CPU. For better performance during CPU inference,
    it is suggested to enable freezing by setting ``export TORCHINDUCTOR_FREEZING=1``
-   before running the Python script below.
+   before running the Python script below. The same behavior works in an environment with Intel®
+   GPU as well.
 
 .. code-block:: python