fix: resolve packaging failure issue

- Changed ReferenceBlockValidPeriod from 64*8 to 64*16 to adjust the block validation period.

src/AElf.Kernel.Types/KernelConstants.cs

@@ -5,7 +5,7 @@ namespace AElf.Kernel;
 
 public static class KernelConstants
 {
-    public const long ReferenceBlockValidPeriod = 64 * 8;
+    public const long ReferenceBlockValidPeriod = 64 * 16;
     public const int ProtocolVersion = 1;
     public const int DefaultRunnerCategory = 0;
     public const int CodeCoverageRunnerCategory = 30;