THRIFT-5832 Drop net6 support and add net9 instead
Client: netstd
Patch: Jens Geyer
diff --git a/build/docker/README.md b/build/docker/README.md
index 9e972b8..6b535df 100644
--- a/build/docker/README.md
+++ b/build/docker/README.md
@@ -188,7 +188,7 @@
 | java      | 17            | 17            |       |
 | js        | Node.js 16.20.2, npm 8.19.4 | Node.js 16.20.2, npm 8.19.4 |     |
 | lua       | 5.2.4         | 5.2.4         | Lua 5.3: see THRIFT-4386 |
-| netstd    | 8.0.200       | 8.0.200       |       |
+| netstd    | 9.0           | 9.0           |       |
 | nodejs    | 16.20.2       | 16.20.2       |       |
 | ocaml     | 4.08.1        | 4.13.1        |       |
 | perl      | 5.30.0        | 5.34.0        |       |