debug github action

- running on rocker r-base results in compliation error about duplicate
  function definition for static cpp11::function readbin::read_bin in
  class definition / auto readbin::readbin in rjsoncons.cpp

.github/workflows/pkgdown.yaml

@@ -22,17 +22,22 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
-      - uses: r-lib/actions/setup-pandoc@v2
+      - uses: r-lib/actions/setup-pandoc@v2.7.2
 
-      - uses: r-lib/actions/setup-r@v2
+      - uses: r-lib/actions/setup-r@v2.7.2
         with:
           use-public-rspm: true
 
-      - uses: r-lib/actions/setup-r-dependencies@v2
+      - name: Compiler
+        run: |
+          g++ --version
+
+      - uses: r-lib/actions/[email protected]
         with:
-          extra-packages: any::pkgdown, local::., tidyr, jqr
+          cache-version: 2
+          extra-packages: any::pkgdown, any::dplyr, any::tidyr, any::jqr, local::.
           needs: website
 
       - name: Build site

src/rjsoncons.cpp

@@ -10,7 +10,7 @@
 using namespace jsoncons;        // convenience
 using namespace cpp11::literals; // _nm
 
-auto readbinbuf::read_bin = cpp11::package("base")["readBin"];
+cpp11::function readbinbuf::read_bin = cpp11::package("base")["readBin"];
 
 [[cpp11::register]]
 std::string cpp_version()