Update update-from-mds.yml

.github/workflows/update-from-mds.yml

@@ -84,6 +84,6 @@ jobs:
           git config --local user.email "action@github.com"
           git config --local user.name "GitHub Action"
           git add -A
-          timestamp=$(date -u)
+          timestamp=$(date -u -I)
           git commit -m "bot: Updated ${timestamp}, ${{ env.COMMIT_MSG }}" -a || exit 0
           git push