FPGA: add caveat for running the build_system.tcl script in the platform_designer code sample (#2358)

Add a disclaimer for the Platform Designer code sample, since the pre-generated quartus project definitely doesn't work with Quartus® Prime 21.2. Confirm that re-building the project as shown in directions works though.

Author: whitepau

DirectProgramming/C++SYCL_FPGA/Tutorials/Tools/platform_designer/README.md

@@ -279,7 +279,7 @@ Follow these steps to compile and test the design:
    > xcopy add_quartus\output_files\add.sof system_console /Y
    ```
 
-You may also build the SOF using the pre-generated Intel® Qupartus® Prime project in the `add_quartus_sln` directory by executing the included `build_system.tcl` script.
+You may also build the SOF using the pre-generated Intel® Qupartus® Prime project in the `add_quartus_sln` directory by executing the included `build_system.tcl` script. This script has been verified against the latest version of Quartus® Prime Pro Edition software available at the time of writing (24.1). The script and pre-generated project may not work with other versions of Quartus® Prime.
 
    Linux: