CI: Update to latest Dockerfile

This primarily updates our python cache.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0a15b73..7d62103 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -10,7 +10,7 @@
 
 # Grab our configured image.  The source for this is found
 # in the u-boot tree at tools/docker/Dockerfile
-image: ${MIRROR_DOCKER}/trini/u-boot-gitlab-ci-runner:jammy-20240227-14Mar2024
+image: ${MIRROR_DOCKER}/trini/u-boot-gitlab-ci-runner:jammy-20240808-21Aug2024
 
 # We run some tests in different order, to catch some failures quicker.
 stages: