Update Docker image reference for testsuite

Author: uNetworkingAB

autobahn/server-test.js

@@ -5,7 +5,7 @@ import { $ } from "https://deno.land/x/dax/mod.ts";
 const pwd = new URL(".", import.meta.url).pathname;
 
 const AUTOBAHN_TESTSUITE_DOCKER =
-  "crossbario/autobahn-testsuite:0.8.2";
+  "crossbario/autobahn-testsuite:0.8.2@sha256:519915fb568b04c9383f70a1c405ae3ff44ab9e35835b085239c258b6fac3074";
 
 const server = $`uWebSockets/EchoServer`.spawn();
 await $`docker run --name fuzzingserver	-v ${pwd}/fuzzingclient.json:/fuzzingclient.json:ro	-v ${pwd}/reports:/reports -p 9001:9001	--net=host --rm	${AUTOBAHN_TESTSUITE_DOCKER} wstest -m fuzzingclient -s fuzzingclient.json`.cwd(pwd);