Show pipeline in expanded mode

The pipeline that this script is running is only creating a dynamic
pipeline and thats why its ok to have it by default show expanded output

Signed-off-by: Alexandros Sapranidis <alexandros@elastic.co>

.buildkite/scripts/generate_pipeline.sh

@@ -4,7 +4,7 @@ set -euo pipefail
 echo "~~~ Install dependencies"
 pip3 install --quiet "ruamel.yaml<0.18.0"
 
-echo "~~~ Run pipeline generator in dry-run mode"
+echo "+++ Run pipeline generator in dry-run mode"
 python3 .buildkite/pipeline.py | yq .
 
 echo "~~~ Upload pipeline"