Add DateOnly and TimeOnly to sandbox

Added in .NET 6

RELEASE-NOTES.md

@@ -39,7 +39,8 @@ END TEMPLATE-->
 
 ### New features
 
-*None yet*
+* Sandbox:
+  * Added `System.DateOnly` and `System.TimeOnly`.
 
 ### Bugfixes
 

Robust.Shared/ContentPack/Sandbox.yml

@@ -1093,6 +1093,7 @@ Types:
       - "string ToHexString(System.ReadOnlySpan`1<byte>)"
 
     Converter`2: { All: True } # Delegate
+    DateOnly: { all: True }
     DateTime: { All: True }
     DateTimeKind: { } # Enum
     DateTimeOffset: { All: True }
@@ -1425,6 +1426,7 @@ Types:
       - "void CopyTo(int, char[], int, int)"
     StringComparison: { } # Enum
     StringSplitOptions: { } # Enum
+    TimeOnly: { all: True }
     TimeSpan: { All: True }
     Type:
       # COM, marshalling, interop, etc... stuff omitted.