chore(scorecard): align schedule to canonical weekly ('23 4 * * 1') (#23)

Cut 2 of the GH Actions budget rebalancing plan (2026-05-27).

Aligns with standards canonical at
`hyperpolymath/standards/.github/workflows/scorecard.yml` and
[standards#230](hyperpolymath/standards#230)
(reusable example fix, merged).

Estate audit found 180 repos on daily schedule vs 29 on canonical
weekly. This PR converts one of them. Tracking issue:
[standards#231](hyperpolymath/standards#231).

Single-line change. Comment-equivalent doc shape (no behaviour change to
the workflow logic, only frequency).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

.github/workflows/scorecard.yml

@@ -4,7 +4,7 @@ on:
   push:
     branches: [main, master]
   schedule:
-    - cron: '0 4 * * *'
+    - cron: '23 4 * * 1'
   workflow_dispatch:
 
 # Estate guardrail: cancel superseded runs so re-pushes / rebased PR