chore(ci): bump hypatia-scan-reusable pin off orphan SHA to canonical main (#70)

Pure hygiene: hypatia-scan.yml pinned to an orphan PR-branch SHA
`97df762` (the pre-squash form of standards#193). File content is
identical to canonical squash-merged SHA `915139d` and to current
standards/main `5eb28d7` (no commits to hypatia-scan-reusable.yml
between them).

Bumped to standards/main HEAD per cross-check guidance in
[standards#220](hyperpolymath/standards#220).

Auto-merge SQUASH.

🤖 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/hypatia-scan.yml

@@ -25,5 +25,5 @@ permissions:
 
 jobs:
   hypatia:
-    uses: hyperpolymath/standards/.github/workflows/hypatia-scan-reusable.yml@97df762107501909f50bb770e9bc200b6c415600
+    uses: hyperpolymath/standards/.github/workflows/hypatia-scan-reusable.yml@5eb28d7d8790d5389b7b6a5233fe6265a775e3d0
     secrets: inherit