Update docs to remove .NET Standard 2.1 support, #1040

Author: paulirwin

README.md

@@ -24,10 +24,9 @@ The Apache Lucene.NET website is at:
 
 ### Lucene.NET 4.8.0
 
-- [.NET 8.0](https://dotnet.microsoft.com/download/dotnet/8.0)
-- [.NET Standard 2.1](https://docs.microsoft.com/en-us/dotnet/standard/net-standard)
+- [.NET 8.0](https://dotnet.microsoft.com/download/dotnet/8.0) or later
 - [.NET Standard 2.0](https://docs.microsoft.com/en-us/dotnet/standard/net-standard)
-- .NET Framework 4.6.2
+- .NET Framework 4.6.2 or later
 
 ## Status
 
@@ -37,8 +36,8 @@ Working toward Lucene.NET 4.8.0 (currently in BETA)
 
 * The beta version is extremely stable
 * Has more than 7800+ passing unit tests
-* Integrates well with .NET 8.0 (as well as other unsupported versions)
-* Supports .NET Standard 2.1 and .NET Standard 2.0
+* Integrates well with .NET 8.0+ (as well as other unsupported versions)
+* Supports .NET Standard 2.0
 * Supports .NET Framework 4.6.2+
 * Some developers already use it in production environments
 

websites/site/index.md

@@ -15,8 +15,8 @@ Lucene.Net is a port of the Lucene search library, written in C# and targeted at
 
 * The beta version is extremely stable
 * Has more than 7800+ passing unit tests
-* Tested daily on all [officially supported versions of .NET](https://dotnet.microsoft.com/en-us/platform/support/policy/dotnet-core)
-* Supports .NET Standard 2.1 and .NET Standard 2.0
+* Integrates well with .NET 8.0+ (as well as other unsupported versions)
+* Supports .NET Standard 2.0
 * Supports .NET Framework 4.6.2+
 * Some developers already use it in production environments