Update pkgdown.yaml

Turned back on and switched to macos rather than ubuntu

Author: robjhyndman

Diff for: .github/workflows/pkgdown.yaml

@@ -1,12 +1,12 @@
 # Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
 # Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
 on:
-  #push:
-  #  branches: [main, master]
-  #pull_request:
-  #  branches: [main, master]
-  #release:
-  #  types: [published]
+  push:
+    branches: [main, master]
+  pull_request:
+    branches: [main, master]
+  release:
+    types: [published]
   workflow_dispatch:
 
 name: pkgdown.yaml
@@ -15,7 +15,7 @@ permissions: read-all
 
 jobs:
   pkgdown:
-    runs-on: ubuntu-latest
+    runs-on: macos-latest
     # Only restrict concurrency for non-PR jobs
     concurrency:
       group: pkgdown-${{ github.event_name != 'pull_request' || github.run_id }}