gh-148932: profiling.sampling Windows limitations

Updates the docs for `profiling.sampling` to note the limitation when
running in a virtual environment on Windows platform.

See #149560

Author: edvilme

Doc/library/profiling.sampling.rst

@@ -387,6 +387,8 @@ This requires one of:
 On Windows, the profiler requires administrative privileges or the
 ``SeDebugPrivilege`` privilege to read another process's memory.
 
+*Note*: Running `profiling.sampling` from a virtual environmnent on Windows platform is not supported. It should be run from the global Python installation.
+
 
 Version compatibility
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