Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: dmytroye

tracker/test/load/Dockerfile.k6

@@ -2,8 +2,8 @@
 # Copyright (C) 2026 Intel Corporation
 
 # Build k6 with the xk6-mqtt extension for MQTT load testing.
-# xk6 Docker tag 1.3.7 bundles xk6 Go module v1.3.7.
-# See: https://github.com/grafana/xk6/releases/tag/v1.3.7
+# xk6 Docker tag 1.4.0 bundles xk6 Go module v1.4.0.
+# See: https://github.com/grafana/xk6/releases/tag/v1.4.0
 FROM grafana/xk6:1.4.0@sha256:3a3d4b02be2ebffa693f98c6699071a082a6b47ab106c6ba1ac72e15f7550b88 AS builder
 ARG http_proxy
 ARG https_proxy