CI: Move to latest Ubuntu "Jammy" tag

Move to the latest "Jammy" tag from Ubuntu.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/tools/docker/Dockerfile b/tools/docker/Dockerfile
index 27821ae..279b3a3 100644
--- a/tools/docker/Dockerfile
+++ b/tools/docker/Dockerfile
@@ -2,7 +2,7 @@
 # This Dockerfile is used to build an image containing basic stuff to be used
 # to build U-Boot and run our test suites.
 
-FROM ubuntu:jammy-20230624
+FROM ubuntu:jammy-20230804
 MAINTAINER Tom Rini <trini@konsulko.com>
 LABEL Description=" This image is for building U-Boot inside a container"