THRIFT-4990 Upgrade to .NET Core 3.1 (LTS)
Client: netstd
Patch: Jens Geyer

This closes #1961
diff --git a/test/netstd/README.md b/test/netstd/README.md
index 8350728..4ece059 100644
--- a/test/netstd/README.md
+++ b/test/netstd/README.md
@@ -6,7 +6,7 @@
 - ThriftTest - tests for Thrift library 
 
 # Reused components 
-- NET Core SDK 3.0
+- NET Core SDK 3.1 (LTS)
 
 # How to build on Windows
 - Get Thrift IDL compiler executable, add to some folder and add path to this folder into PATH variable