Fix build for .NET 8.

Author: Nihlus

Remora.Rest.Xunit/Remora.Rest.Xunit.csproj

@@ -6,11 +6,11 @@
     </PropertyGroup>
 
     <PropertyGroup>
-        <VersionPrefix>3.0.2</VersionPrefix>
+        <VersionPrefix>3.0.3</VersionPrefix>
         <Description>Supporting types for writing expressive unit tests of REST-focused API wrappers, allowing simple and direct testing of expected clientside behaviour.
         </Description>
         <PackageReleaseNotes>
-            Update nuget packages and SDK.
+            Fix build for .NET 8.
         </PackageReleaseNotes>
     </PropertyGroup>