gitlab-ci: Update comment about the Dockerfile
It's found in the u-boot tree now.
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5592862..cebd76d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0+
-# Grab our configured image. The source for this is found at:
-# https://source.denx.de/u-boot/gitlab-ci-runner
+# Grab our configured image. The source for this is found
+# in the u-boot tree at tools/docker/Dockerfile
image: trini/u-boot-gitlab-ci-runner:jammy-20220801-09Aug2022
# We run some tests in different order, to catch some failures quicker.