Reduce memory allocations in LowSurrogateConverter for .NET 8 (#2901)

* Remove .ToArrat() for .NET 8

* Fix names

* Bump SixLabors.imageSharp to 3.1.7

Author: IliaBrahinets

lib/PuppeteerSharp.Tests/PuppeteerSharp.Tests.csproj

@@ -18,7 +18,7 @@
 		</PackageReference>
 		<PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
 		<PackageReference Include="System.Net.Http" Version="4.3.4" />
-		<PackageReference Include="SixLabors.ImageSharp" Version="3.1.5" />
+		<PackageReference Include="SixLabors.ImageSharp" Version="3.1.7" />
 		<PackageReference Include="Microsoft.AspNetCore.Connections.Abstractions" Version="2.2.0" />
 	</ItemGroup>
 	<Import Project="../Common/CommonProps.props" />

lib/PuppeteerSharp/Helpers/Json/LowSurrogateConverter.cs

@@ -15,7 +15,13 @@ public override string Read(ref Utf8JsonReader reader, Type typeToConvert, JsonS
             return null;
         }
 
-        var span = reader.HasValueSequence ? reader.ValueSequence.ToArray() : reader.ValueSpan.ToArray();
+        var span = reader.HasValueSequence
+            ? reader.ValueSequence.ToArray()
+#if NET8_0_OR_GREATER
+            : reader.ValueSpan;
+#else
+            : reader.ValueSpan.ToArray();
+#endif
         var value = Encoding.UTF8.GetString(span);
 
         try