Revert "wprkflows/bot: increase frequency to every 5 minutes"

This partially reverts commit 1197fe48da.

GitHub just doesn't schedule these narrow intervals. 10 minutes is
alright in practice.

.github/workflows/bot.yml

@@ -7,9 +7,9 @@ name: Bot
 
 on:
   schedule:
-    # Run every 5m
+    # Run every 10m
     # i.e., at each of the listed minutes, every hour
-    - cron: '02,07,12,17,22,27,32,37,42,47,52,57 * * * *'
+    - cron: '05,15,25,35,45,55 * * * *'
   workflow_call:
     inputs:
       headBranch:

ci/github-script/bot.js

@@ -587,7 +587,7 @@ module.exports = async ({ github, context, core, dry }) => {
         state: 'open',
         sort: 'created',
         direction: 'asc',
-        per_page: 50,
+        per_page: 100,
         after: cursor,
       })