add link to breaking change (dotnet#10993)

Author: gewarren

xml/System.Runtime.InteropServices/RuntimeInformation.xml

@@ -207,7 +207,10 @@ The property returns a string that indicates the name of the currently executing
 
 ## Remarks
 
-The returned value is intended to represent the actual architecture of the underlying operating system. It is a best effort to ignore the architecture emulation infrastructure that may be involved to run the process. The returned value takes into account emulation built into Windows and macOS operating systems. The returned value does not take into account emulation using QEMU that is typically used on Linux operating system.
+The returned value is intended to represent the actual architecture of the underlying operating system. It's a best effort to ignore the architecture emulation infrastructure that might be involved to run the process. The returned value takes into account emulation built into Windows and macOS operating systems. The returned value does not take into account emulation using QEMU that's typically used on Linux.
+
+> [!NOTE]
+> The behavior of this property for emulated processes changed, starting in .NET 7. For more information, see [RuntimeInformation.OSArchitecture under emulation](/dotnet/core/compatibility/interop/7.0/osarchitecture-emulation).
 
  ]]></format>
         </remarks>