fix github action

.github/workflows/pandoc.yml

@@ -7,18 +7,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+
       - name: create file list
         id: files_list
         run: |
 #          echo "Lorem ipsum" > lorem_1.md  # create two example files
 #          echo "dolor sit amet" > lorem_2.md
           mkdir output  # create output dir
 #          echo "files=$(printf '"%s" ' *.md)" > $GITHUB_OUTPUT
-          $GITHUB_OUTPUT=introduction/*.md strategie/*.md ux/*.md ui/*.md code/*.md architecture/*.md
+          $GITHUB_OUTPUT="introduction/*.md strategie/*.md ux/*.md ui/*.md code/*.md architecture/*.md"
 
       - uses: docker://pandoc/latex
         with:
           args: --output=output/Referentiel-ECOCONCEPTION.pdf ${{ steps.files_list.outputs.files }} --metadata-file pandoc-assets/meta.yml --pdf-engine xelatex --metadata-file pandoc-assets/meta.yml --template pandoc-assets/templates/eisvogel.tex --from markdown+yaml_metadata_block+raw_html+rebase_relative_paths
+
       - uses: actions/upload-artifact@v4
         with:
           name: output