Fix incorrect docker compose wait command

The recent change buildbarn#129 used the old 'docker-compose', which did not have
the '--wait' flag. This keeps the composition modern in line with buildbarn#126 .

tools/test-deployment-docker-compose.sh

@@ -19,7 +19,8 @@ trap cleanup EXIT
 # --- Run remote execution ---
 rm -rf volumes/storage-*
 ./run.sh -d
-docker-compose up --wait || true
+# NB: 'up' exits with non-zero exit code.
+docker compose up --wait || true
 bazel_command_log="$(bazel info output_base)/command.log"
 bazel clean
 bazel test --color=no --curses=no --config=remote-ubuntu-22-04 --disk_cache= @abseil-hello//:hello_test