Update website build actions

Author: douglowe

.github/workflows/website.yml

@@ -19,7 +19,8 @@ jobs:
       - name: Set up Ruby
         uses: actions/setup-ruby@v1
         with:
-          ruby-version: '2.7'
+          ruby-version: '3.1'
+          bundler-cache: true
 
       - name: Set up Python
         uses: actions/setup-python@v2
@@ -28,10 +29,12 @@ jobs:
 
       - name: Install GitHub Pages, Bundler, and kramdown gems
         run: |
-          gem install github-pages bundler kramdown
+          gem install github-pages bundler kramdown kramdown-parser-gfm
+
       - name: Install Python modules
         run: |
           python3 -m pip install --upgrade pip setuptools wheel pyyaml==5.3.1 requests
+
       - name: Checkout the lesson
         uses: actions/checkout@master
         with:
@@ -41,16 +44,18 @@ jobs:
       - name: Look for R-markdown files
         id: check-rmd
         run: |
-          echo "::set-output name=count::$(shopt -s nullglob; files=($(find . -iname '*.Rmd')); echo ${#files[@]})"
+          echo "count=$(shopt -s nullglob; files=($(find . -iname '*.Rmd')); echo ${#files[@]})" >> $GITHUB_OUTPUT
+  
       - name: Set up R
         if: steps.check-rmd.outputs.count != 0
-        uses: r-lib/actions/setup-r@master
+        uses: r-lib/actions/setup-r@v2
         with:
-          r-version: 'release'
+          use-public-rspm: true
+          install-r: false
 
       - name: Cache R packages
         if: steps.check-rmd.outputs.count != 0
-        uses: actions/cache@v1
+        uses: actions/cache@v2
         with:
           path: ${{ env.R_LIBS_USER }}
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}
@@ -80,6 +85,7 @@ jobs:
           do
             eval sudo $cmd
           done < <(Rscript -e 'cat(remotes::system_requirements("ubuntu", "20.04"), sep = "\n")')
+ 
       - name: Render the markdown and confirm that the site can be built
         run: make site
 
@@ -105,5 +111,6 @@ jobs:
           git push origin gh-pages
           # return
           cd ..
+
       - run: make lesson-check-all
         if: always()