Update website.yml

Author: AndrzejRomaniuk

Diff for: .github/workflows/website.yml

@@ -47,7 +47,7 @@ jobs:
 
       - name: Set up R
         if: steps.check-rmd.outputs.count != 0
-        uses: r-lib/actions/setup-r@master
+        uses: r-lib/actions/setup-r@old
         with:
           r-version: 'release'