CI: Update to latest Dockerfile

This primarily updates our python cache.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/.azure-pipelines.yml b/.azure-pipelines.yml
index e1b2f87..93111eb 100644
--- a/.azure-pipelines.yml
+++ b/.azure-pipelines.yml
@@ -2,7 +2,7 @@
   windows_vm: windows-2019
   ubuntu_vm: ubuntu-22.04
   macos_vm: macOS-12
-  ci_runner_image: trini/u-boot-gitlab-ci-runner:jammy-20240227-14Mar2024
+  ci_runner_image: trini/u-boot-gitlab-ci-runner:jammy-20240808-21Aug2024
   # Add '-u 0' options for Azure pipelines, otherwise we get "permission
   # denied" error when it tries to "useradd -m -u 1001 vsts_azpcontainer",
   # since our $(ci_runner_image) user is not root.