Remove .NET 6.0 tests to avoid GH build failures (#124)

* try fix test on GH

* remove .NET 6.0 tests

Author: gasparnagy

Tests/Connector/Reqnroll.VisualStudio.ReqnrollConnector.Tests/AssemblyLoadingTests.cs

@@ -73,7 +73,7 @@ public void Loads_From_AspNetCoreAssembly()
 
         //act
         var loadedAssembly = loadContext.LoadFromAssemblyName(new AssemblyName("Microsoft.AspNetCore.Antiforgery")
-            {Version = new Version(6, 0)});
+            {Version = new Version(8, 0)});
 
         //assert
         loadedAssembly.GetName().Name.Should().Be("Microsoft.AspNetCore.Antiforgery");

Tests/Reqnroll.VisualStudio.Specs/Features/Discovery/DiscoveryPlatformCompatibility.feature

@@ -9,6 +9,5 @@ Scenario Outline: Discover bindings from a Reqnroll project in different .NET Co
 	Then the discovery succeeds with several step definitions
 Examples: 
 	| framework |
-	| net6.0    |
 	| net8.0    |
 	| net9.0    |

Tests/Reqnroll.VisualStudio.Specs/Features/Discovery/SourceLocationDiscovery.feature

@@ -25,6 +25,5 @@ Scenario Outline: Discover binding source location from Reqnroll project with as
 Examples:
 	| framework |
 	| net481    |
-	| net6.0    |
 	| net8.0    |
 	| net9.0    |