Fix boxing in PropertyGetter.CallPropertyGetter method to box value explicitly

Co-authored-by: javiercn <[email protected]>

Author: Copilot

src/Components/Components/src/Reflection/PropertyGetter.cs

@@ -53,6 +53,6 @@ public PropertyGetter(Type targetType, PropertyInfo property)
         object target)
         where TTarget : notnull
     {
-        return Getter((TTarget)target);
+        return (object?)Getter((TTarget)target);
     }
 }