Update GitHub Artifact Actions

Author: renovate[bot]

.github/workflows/asciidoc.yml

@@ -34,7 +34,7 @@ jobs:
         with:
           program: asciidoctor -D public -b html5 -o index.html -a toc=left -a revdate="${{ steps.rev_info.outputs.date }}" -a revnumber="${{ steps.rev_info.outputs.version }}" -a source-highlighter=rouge repo/README.adoc
       - name: Upload AsciiDoc documentation
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: docs-${{ github.sha }}
           path: public
@@ -47,7 +47,7 @@ jobs:
     environment: github-pages-branch
     steps:
       - name: Download documentation artifact into ./public
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: docs-${{ github.sha }}
           path: public