fix: Update add-quarterly-gh-requests.yml (#934)

It was previously matching any day in the given months instead of
on the first day of each matching month.  This is what was causing so
many tickets to get created.

.github/workflows/add-quarterly-gh-requests.yml

@@ -1,7 +1,7 @@
 name: Create quarterly issues
 on:
   schedule:
-    - cron: 0 0 * 1,4,7,10 *
+    - cron: 0 0 1 1,4,7,10 *
   workflow_dispatch: {}
 
 jobs: