fix: Detect package manager for Quarto deps in r-hub containers.

The atlas platform uses a Fedora-based container without apt-get; fall
back to dnf/yum so the sudo and jq install step succeeds there.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: Cidree

.github/workflows/rhub.yaml

@@ -61,7 +61,17 @@ jobs:
           token: ${{ secrets.RHUB_TOKEN }}
           job-config: ${{ matrix.config.job-config }}
       - name: Install Quarto dependencies (sudo, jq)
-        run: apt-get update -q && apt-get install -y -q sudo jq
+        run: |
+          if command -v apt-get >/dev/null; then
+            apt-get update -q && apt-get install -y -q sudo jq
+          elif command -v dnf >/dev/null; then
+            dnf install -y sudo jq
+          elif command -v yum >/dev/null; then
+            yum install -y sudo jq
+          else
+            echo "No supported package manager found (apt-get/dnf/yum)" >&2
+            exit 1
+          fi
       - uses: quarto-dev/quarto-actions/setup@v2
       - uses: r-hub/actions/run-check@v1
         with: