tests/CSharpLanguageServer.Tests/ReferenceTests.fs: restore testReferenceWorksToAspNetRazorPageReferencedValue

Author: razzmatazz

tests/CSharpLanguageServer.Tests/ReferenceTests.fs

@@ -90,7 +90,6 @@ let testReferenceWorks(testDataDir: string) =
     Assert.AreEqual(expectedLocations2, locations2.Value)
 
 [<TestCase>]
-[<Ignore("flakyness; see https://github.com/razzmatazz/csharp-language-server/pull/223")>]
 let testReferenceWorksToAspNetRazorPageReferencedValue() =
     use client = setupServerClient defaultClientProfile
                                    "TestData/testReferenceWorksToAspNetRazorPageReferencedValue"