ci(hypatia-scan): repin reusable to merge-commit SHA (#20)

The wrapper pins to 97df762..., the PR-branch commit on standards#193
that was orphaned after squash-merge. The new pin 915139d7... is the
merge-commit SHA on standards/main; file content is byte-identical.

Estate fix: ~100 repos affected by the same orphan.

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@915139d73560e65a8240b8fc7768698658502c89
     secrets: inherit