Bump ioredis from 5.4.1 to 5.6.0

Bumps [ioredis](https://github.com/luin/ioredis) from 5.4.1 to 5.6.0.
- [Release notes](https://github.com/luin/ioredis/releases)
- [Changelog](https://github.com/redis/ioredis/blob/main/CHANGELOG.md)
- [Commits](redis/ioredis@v5.4.1...v5.6.0)

---
updated-dependencies:
- dependency-name: ioredis
  dependency-version: 5.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -42,7 +42,7 @@
   },
   "optionalDependencies": {
     "@redis/client": "^1.6.0",
-    "ioredis": "^5.4.1"
+    "ioredis": "^5.6.0"
   },
   "engines": {
     "node": ">=20.19.0"

packages/server/package.json

@@ -24,7 +24,7 @@
     "@types/debug": "^4.1.12",
     "@types/mocha": "^10.0.6",
     "@types/node": "^22.13.7",
-    "ioredis": "^5.4.1",
+    "ioredis": "^5.6.0",
     "mocha": "^11.0.1",
     "should": "^13.2.3"
   },