Simplify scheduling restriction to Homebrew ownership

Co-authored-by: Bo Anderson <[email protected]>

.github/workflows/ruby.yml

@@ -5,7 +5,7 @@ on:
   workflow_dispatch:
 jobs:
   build:
-    if: ( github.event.schedule && github.repository == 'homebrew/homebrew-linux-fonts' ) || ! github.event.schedule
+    if: github.repository_owner == 'Homebrew' || !github.event.schedule
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4