Azure/GitLab CI: Update docker image

Rebuild our current docker image so that ca-certificates will be updated
and Let's Encrypt issued certificates will work again.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1bd99c8..5a3e2f0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@
 
 # Grab our configured image.  The source for this is found at:
 # https://source.denx.de/u-boot/gitlab-ci-runner
-image: trini/u-boot-gitlab-ci-runner:focal-20210827-11Sep2021
+image: trini/u-boot-gitlab-ci-runner:focal-20210827-30Sep2021
 
 # We run some tests in different order, to catch some failures quicker.
 stages: