THRIFT-5832 Drop net6 support and add net9 instead
Client: netstd
Patch: Jens Geyer
diff --git a/lib/netstd/Makefile.am b/lib/netstd/Makefile.am
index e7142b0..ed855e4 100644
--- a/lib/netstd/Makefile.am
+++ b/lib/netstd/Makefile.am
@@ -24,7 +24,7 @@
 
 check-local:
 	$(DOTNETCORE) test Tests/Thrift.Compile.Tests/Thrift.Compile.net8/Thrift.Compile.net8.csproj
-	$(DOTNETCORE) test Tests/Thrift.Compile.Tests/Thrift.Compile.net6/Thrift.Compile.net6.csproj
+	$(DOTNETCORE) test Tests/Thrift.Compile.Tests/Thrift.Compile.net9/Thrift.Compile.net9.csproj
 	$(DOTNETCORE) test Tests/Thrift.Compile.Tests/Thrift.Compile.netstd2/Thrift.Compile.netstd2.csproj
 	$(DOTNETCORE) test Tests/Thrift.Tests/Thrift.Tests.csproj
 	$(DOTNETCORE) test Tests/Thrift.IntegrationTests/Thrift.IntegrationTests.csproj
@@ -40,8 +40,8 @@
 	$(RM) -r Tests/Thrift.IntegrationTests/obj
 	$(RM) -r Tests/Thrift.Compile.Tests/Thrift.Compile.net8/bin
 	$(RM) -r Tests/Thrift.Compile.Tests/Thrift.Compile.net8/obj
-	$(RM) -r Tests/Thrift.Compile.Tests/Thrift.Compile.net6/bin
-	$(RM) -r Tests/Thrift.Compile.Tests/Thrift.Compile.net6/obj
+	$(RM) -r Tests/Thrift.Compile.Tests/Thrift.Compile.net9/bin
+	$(RM) -r Tests/Thrift.Compile.Tests/Thrift.Compile.net9/obj
 	$(RM) -r Tests/Thrift.Compile.Tests/Thrift.Compile.netstd2/bin
 	$(RM) -r Tests/Thrift.Compile.Tests/Thrift.Compile.netstd2/obj
 
@@ -58,7 +58,7 @@
 	Tests/Thrift.Compile.Tests/CassandraTest.thrift \
 	Tests/Thrift.Compile.Tests/optional_required_default.thrift \
 	Tests/Thrift.Compile.Tests/Thrift.Compile.net8/Thrift.Compile.net8.csproj \
-	Tests/Thrift.Compile.Tests/Thrift.Compile.net6/Thrift.Compile.net6.csproj \
+	Tests/Thrift.Compile.Tests/Thrift.Compile.net9/Thrift.Compile.net9.csproj \
 	Tests/Thrift.Compile.Tests/Thrift.Compile.netstd2/Thrift.Compile.netstd2.csproj \
 	Tests/Thrift.Tests/Collections \
 	Tests/Thrift.Tests/DataModel \