GitLab-CI: Switch to docker:latest

Docker 24 is no longer supported by Docker 29 hosts.

Change-Id: I41a57f9e78a7761081700a5d69a174e4b781ed08
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c808099..7d3485b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -40,9 +40,9 @@
 # Build Docker image stage - runs automatically for tags and is manually triggerable otherwise
 build-docker:
   stage: build
-  image: docker:24.0.5
+  image: docker:latest
   services:
-    - docker:24.0.5-dind
+    - docker:dind
   before_script:
     - apk add --no-cache xz
   script: