Update dotnet471-known-issues.md (microsoft#775)

Author: AlexGhiondea

releases/net471/dotnet471-known-issues.md

@@ -15,5 +15,6 @@ This document lists the known issues that you may experience after you install t
 - [517815 - BCL - Stack traces are missing source information for frames with debug information in the Portable PDB format when running on .NET Framework 4.7.1](https://github.com/Microsoft/dotnet/blob/master/releases/net471/KnownIssues/517815-BCL%20Stack%20traces%20are%20missing%20source%20information%20for%20frames%20with%20debug%20information%20in%20the%20Portable%20PDB%20format.md)
 - [553390 - BCL - SGEN crashes trying to load the System.IO.Compression.FileSystem reference assembly]( https://github.com/Microsoft/dotnet/blob/master/releases/net471/KnownIssues/553390%20-%20BCL%20-%20SGEN%20crashes%20because%20it%20references%20System.IO.Compression.ZipFile.dll.md)
 - [534719 - BCL - Targeting .NET Framework 4.7.1 copies extra files to your bin directory](https://github.com/Microsoft/dotnet/blob/master/releases/net471/KnownIssues/514195-Targeting%20.NET%20Framework%204.7.1%20copies%20extra%20files%20to%20your%20bin%20directory.md)
+- [623552 - BCL - Assembly versions higher than 4.0.0.0 for System.IO.Compression.ZipFile cannot be loaded without a binding redirect](https://github.com/Microsoft/dotnet/blob/master/releases/net471/KnownIssues/623552-BCL%20Higher%20assembly%20versions%20that%204.0.0.0%20for%20System.IO.Compression.ZipFile%20cannot%20be%20loaded%20without%20a%20binding%20redirect.md)
 - [523633 - Setup - Application crashes occur when running on the .NET Framework 4.7.1 after upgrading from Windows 10 Anniversary Update to Windows 10 Creators Update](https://github.com/Microsoft/dotnet/blob/master/releases/net471/KnownIssues/523633%20-%20Setup%20-%20OS%20upgrade%20to%20Windows%2010%20gets%20the%20product%20in%20bad%20state.md)
 - [534719 - Networking - ServicePoint.ConnectionLimit default behavior with loopback changed unexpectedly](https://github.com/Microsoft/dotnet/blob/master/releases/net471/KnownIssues/534719-Networking.ServicePoint.ConnectionLimit%20default%20behavior%20changed.md)