Update setup action

Author: mine-cetinkaya-rundel

.github/workflows/render-rmd.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: macOS-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: r-lib/actions/setup-r@v1
+      - uses: r-lib/actions/setup-r@v2
       - uses: r-lib/actions/setup-pandoc@v1
       - name: Install rmarkdown, remotes, and the local package
         run: |