fix date

Author: chienyuanchang

.github/workflows/test_actions.yml

@@ -44,7 +44,7 @@ jobs:
 
       - name: Set TRAINING_DATA_PATH and REFERENCE_DOC_PATH with datetime
         run: |
-          TS=$(date +'%Y%m%d_%H%M%S')
+          TS=$(date -u +'%Y%m%d_%H%M%S')
           echo "TRAINING_DATA_PATH=test_notebooks/training_data_${TS}" >> $GITHUB_ENV
           echo "REFERENCE_DOC_PATH=test_notebooks/reference_docs_${TS}" >> $GITHUB_ENV