Update docker Docker tag to v29

Author: renovate[bot]

.gitlab-ci.yml

@@ -22,7 +22,7 @@ stages:
     DOCKER_HOST: tcp://docker:2376
     DOCKER_TLS_CERTDIR: /certs
   services:
-    - name: docker:28.5.2-dind
+    - name: docker:29.2.1-dind
       alias: docker
       entrypoint: [ "sh", "-c", "dockerd-entrypoint.sh $DOCKER_OPTIONS" ]