chore(deps): update dependency @pact-foundation/pact to v15

Author: renovate[bot]

package-lock.json

@@ -75,7 +75,7 @@
   },
   "devDependencies": {
     "@edx/reactifex": "2.2.0",
-    "@pact-foundation/pact": "^13.0.0",
+    "@pact-foundation/pact": "^15.0.0",
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.2.0",
     "@testing-library/user-event": "14.6.1",