#51390 update path

src/libraries/Common/tests/TestUtilities/System/IO/FileCleanupTestBase.cs

@@ -170,7 +170,7 @@ protected static string GetNamedPipeServerStreamName()
 
             const int MinUdsPathLength = 104; // required min is 92, but every platform we currently target is at least 104
             const int MinAvailableForSufficientRandomness = 5; // we want enough randomness in the name to avoid conflicts between concurrent tests
-            string prefix = Path.Combine(Path.GetTempPath(), "CoreFxPipe");
+            string prefix = Path.Combine(Path.GetTempPath(), "FxPipe");
             int availableLength = MinUdsPathLength - prefix.Length - 1; // 1 - for possible null terminator
             Assert.True(availableLength >= MinAvailableForSufficientRandomness, $"UDS prefix {prefix} length {prefix.Length} is too long");