Fix CI: use pandoc directly instead of docker

Author: dacap

.github/workflows/md-to-pdf.yml

@@ -12,9 +12,9 @@ jobs:
         run: |
           echo "files=$(printf '\"%s\" ' *.md | sed 's/ \"sidebar\.md\"/ /' | sed 's/ \"overview\.md\"/ /' && printf '\"%s\" ' extensions/*.md)" > $GITHUB_OUTPUT
           mkdir output
-      - uses: docker://pandoc/extra:latest-ubuntu
-        with:
-          args: >-
+      - name: Running Pandoc
+        run: |
+          pandoc
             --output=output/aseprite-docs.pdf "overview.md" ${{ steps.files_list.outputs.files }}
             --pdf-engine=lualatex
             -f markdown_github
@@ -30,7 +30,7 @@ jobs:
             -V colorlinks
             -V urlcolor=NavyBlue
             -V geometry:"top=2cm, bottom=1.5cm, left=2cm, right=2cm"
-      - uses: actions/upload-artifact@master
+      - uses: actions/upload-artifact@v3
         with:
           name: aseprite-docs
           path: output/aseprite-docs.pdf