change something small just to triegger the CI

Author: adamsitnik

tests/BenchmarkDotNet.Tests/ReflectionTests.cs

@@ -114,7 +114,7 @@ private GenericNoPublicCtor() { }
             [Benchmark] public T Create() => default;
         }
 
-        [FactDotNetCore21Only("the implicit cast operator is available only in .NET Core 2.1+ (See https://github.com/dotnet/corefx/issues/30121 for more)")]
+        [FactDotNetCoreOnly("the implicit cast operator is available only in .NET Core 2.1+ (See https://github.com/dotnet/corefx/issues/30121 for more)")]
         public void StringCanBeUsedAsReadOnlySpanOfCharArgument() => Assert.True(typeof(ReadOnlySpan<char>).IsStackOnlyWithImplicitCast("a string"));
 
         [Fact]