Update workflow to fix an issue with MacOS

Author: giabaio

.github/workflows/check-standard.yaml

@@ -50,6 +50,10 @@ jobs:
       - uses: r-lib/actions/setup-r-dependencies@v2
         with:
           dependencies: '"all"'
+          use-pak: true
+          pak-version: stable
+          cache: true
+          lockfile: false
           extra-packages: |
             rcmdcheck
             rstan