Mark System.Data.SqlClient as archived component (dotnet/corefx#40946)

Commit migrated from dotnet/corefx@f557428

docs/libraries/project-docs/issue-guide.md

@@ -54,7 +54,7 @@ Areas are tracked by labels area-* (e.g. area-System.Collections). Each area
 | [System.Configuration](https://github.com/dotnet/corefx/labels/area-System.Configuration)     | **[@maryamariyan](https://github.com/maryamariyan)**, [@safern](https://github.com/safern) |  |
 | [System.Console](https://github.com/dotnet/corefx/labels/area-System.Console)                 | [@wtgodbe](https://github.com/wtgodbe) |  |
 | [System.Data](https://github.com/dotnet/corefx/labels/area-System.Data)                       | **[@divega](https://github.com/divega)**, [@ajcvickers](https://github.com/ajcvickers),[@cheenamalhotra](https://github.com/cheenamalhotra), [@david-engel](https://github.com/david-engel), [@Gary-Zh ](https://github.com/Gary-Zh) | <ul><li>Odbc, OleDb - [@saurabh](https://github.com/saurabh)</li></ul> |
-| [System.Data.SqlClient](https://github.com/dotnet/corefx/labels/area-System.Data.SqlClient)   | **[@cheenamalhotra](https://github.com/cheenamalhotra)**, [@Gary-Zh ](https://github.com/Gary-Zh), [@david-engel](https://github.com/david-engel) | |
+| [System.Data.SqlClient](https://github.com/dotnet/corefx/labels/area-System.Data.SqlClient)   | **[@cheenamalhotra](https://github.com/cheenamalhotra)**, [@Gary-Zh ](https://github.com/Gary-Zh), [@david-engel](https://github.com/david-engel) | Archived component - limited churn/contributions (see https://devblogs.microsoft.com/dotnet/introducing-the-new-microsoftdatasqlclient/) |
 | [System.Diagnostics](https://github.com/dotnet/corefx/labels/area-System.Diagnostics)         | **[@wtgodbe](https://github.com/wtgodbe)**, [@krwq](https://github.com/krwq) | <ul><li>System.Diagnostics.EventLog - [@Anipik](https://github.com/Anipik)</li></ul> |
 | [System.Diagnostics.Process](https://github.com/dotnet/corefx/labels/area-System.Diagnostics.Process) | **[@wtgodbe](https://github.com/wtgodbe)**, [@krwq](https://github.com/krwq) |  |
 | [System.Diagnostics.Tracing](https://github.com/dotnet/corefx/labels/area-System.Diagnostics.Tracing) | [@noahfalk](https://github.com/noahfalk), [@tommcdon](https://github.com/tommcdon), [@Anipik](https://github.com/Anipik) | Packages:<ul><li>System.Diagnostics.DiagnosticSource</li><li>System.Diagnostics.PerformanceCounter - [@Anipik](https://github.com/Anipik)</li><li>System.Diagnostics.Tracing</li><li>System.Diagnostics.TraceSource - [@Anipik](https://github.com/Anipik)</li></ul><br/> |