autobahn: make timeout higher

It seems like GitHub Actions went slower in the last months since we
sometimes observe a problem when our `autobahn-server` is not started
quickly enough which leads to the autobahn suite trying to connect to
the server that is not yet running resulting into failed pipeline.

See https://github.com/snapview/tokio-tungstenite/runs/6658266507?check_suite_focus=true

scripts/autobahn-client.sh

@@ -31,6 +31,6 @@ docker run -d --rm \
     crossbario/autobahn-testsuite \
     wstest -m fuzzingserver -s 'autobahn/fuzzingserver.json'
 
-sleep 3
+sleep 5
 cargo run --release --features async-std-runtime --example autobahn-client
 test_diff

scripts/autobahn-server.sh

@@ -23,7 +23,7 @@ function test_diff() {
 }
 
 cargo run --release --features async-std-runtime --example autobahn-server & WSSERVER_PID=$!
-sleep 3
+sleep 5
 
 docker run --rm \
     -v "${PWD}/autobahn:/autobahn" \