FPGA: Update gzip throughput experiment date

Author: yuguen

DirectProgramming/C++SYCL_FPGA/ReferenceDesigns/gzip/README.md

@@ -112,7 +112,7 @@ Additionaly, the cmake build system can be configured using the following parame
 
 ### Performance
 
-Performance results are based on testing as of August 30, 2023.
+Performance results are based on testing as of May 14, 2024.
 
 > **Note**: Refer to the [Performance Disclaimers](/DirectProgramming/C++SYCL_FPGA/README.md#performance-disclaimers) section for important performance information.