Bump aws-sdk-mock from 5.5.1 to 5.6.0 in /hedera-mirror-rest

Bumps [aws-sdk-mock](https://github.com/dwyl/aws-sdk-mock) from 5.5.1 to 5.6.0.
- [Release notes](https://github.com/dwyl/aws-sdk-mock/releases)
- [Commits](dwyl/aws-sdk-mock@v5.5.1...v5.6.0)

---
updated-dependencies:
- dependency-name: aws-sdk-mock
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

hedera-mirror-rest/package.json

@@ -85,7 +85,7 @@
   ],
   "devDependencies": {
     "app-root-path": "^3.0.0",
-    "aws-sdk-mock": "^5.5.1",
+    "aws-sdk-mock": "^5.6.0",
     "axios": "^0.25.0",
     "codecov": "^3.8.3",
     "eslint-config-airbnb-base": "^15.0.0",