ASA-151: Run R-check-release.yml on macOS instead

Author: tyler-richardett

.github/workflows/R-check-release.yml

@@ -5,7 +5,7 @@ on: [push]
 
 jobs:
   R-CMD-check:
-    runs-on: ubuntu-latest
+    runs-on: macOS-latest
     steps:
       - name: Check out repository code
         uses: actions/checkout@v2