Update dependency Microsoft.AspNetCore.WebUtilities to v10 (#2090)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

src/Refit.Tests/Refit.Tests.csproj

@@ -33,7 +33,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="$(TargetFramework.StartsWith('net4'))">
-    <PackageReference Include="Microsoft.AspNetCore.WebUtilities" Version="2.3.10" />
+    <PackageReference Include="Microsoft.AspNetCore.WebUtilities" Version="10.0.8" />
   </ItemGroup>
 
   <ItemGroup>