Needs to add Pandoc devel special action

Author: cderv

.github/workflows/R-CMD-check.yaml

@@ -63,9 +63,13 @@ jobs:
         shell: Rscript {0}
 
       - uses: r-lib/actions/setup-pandoc@v1
+        if: matrix.config.pandoc != 'devel'
         with:
           pandoc-version: ${{ matrix.config.pandoc }}
 
+      - uses: cderv/actions/setup-pandoc-nightly@nightly-pandoc
+        if: matrix.config.pandoc == 'devel'
+
       - uses: r-lib/actions/setup-tinytex@v1
 
       - name: preinstall some CTAN packages