chore(deps): Bump @relaycorp/shared-config from 1.14.1 to 1.15.1

Bumps [@relaycorp/shared-config](https://github.com/relaycorp/shared-config) from 1.14.1 to 1.15.1.
- [Release notes](https://github.com/relaycorp/shared-config/releases)
- [Changelog](https://github.com/relaycorp/shared-config/blob/main/.releaserc.yml)
- [Commits](relaycorp/shared-config@v1.14.1...v1.15.1)

---
updated-dependencies:
- dependency-name: "@relaycorp/shared-config"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -54,7 +54,7 @@
     "webcrypto-core": "< 2.0"
   },
   "devDependencies": {
-    "@relaycorp/shared-config": "^1.14.1",
+    "@relaycorp/shared-config": "^1.15.1",
     "@types/jest": "^29.5.13",
     "del-cli": "^6.0.0",
     "jest": "^29.7.0",