Change when and where the update benchmarks gets run

Author: NicholasR77

.github/workflows/roll20-update-benchmark.yml

@@ -3,7 +3,10 @@ name: Publish benchmarks to GitHub Pages
 on:
   push:
     branches:
-      - update-chipsets
+      - master
+  workflow_dispatch:
+  schedule:
+    - cron: '0 0 */14 * *'  # every 14 days at midnight UTC
 
 permissions:
   contents: read