Repair stale rapp-qonto-keycape-client wiki anchor

The catalog pointed at wiki/CredentialRouting.md#credential-routing-catalog,
which does not exist; the live heading is "Routing catalog index". Restores
tests/test_routing.py to 61/61.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

registry/routing/catalog.yaml

@@ -457,7 +457,7 @@ entries:
     owner_repo: key-cape
     subsystem: KeyCape + OpenBao
     warden_executes: false
-    wiki_ref: wiki/CredentialRouting.md#credential-routing-catalog
+    wiki_ref: wiki/CredentialRouting.md#routing-catalog-index
     canon_ref: key-cape/docs/qonto-runtime-identity-contract.md
     reviewed: "2026-07-27"
     status: active