chore(deps): bump @relaycorp/shared-config from 1.14.1 to 1.15.0

Bumps [@relaycorp/shared-config](https://github.com/relaycorp/shared-config) from 1.14.1 to 1.15.0.
- [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...v1.15.0)

---
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

@@ -45,7 +45,7 @@
   "devDependencies": {
     "@jest/globals": "^29.6.4",
     "@relaycorp/eslint-config": "^1.1.231",
-    "@relaycorp/shared-config": "^1.14.1",
+    "@relaycorp/shared-config": "^1.15.0",
     "@types/jest": "^29.5.12",
     "del-cli": "^5.1.0",
     "eslint": "^8.57.0",