connect-redis no longer compatible with @fastify/session

### Prerequisites

- [X] I have written a descriptive issue title
- [X] I have searched existing issues to ensure the bug has not already been reported

### Fastify version

4.24.3

### Plugin version

10.6.0

### Node.js version

18.17.0

### Operating system

macOS

### Operating system version (i.e. 20.04, 11.3, 10)

14.0

### Description

Trying to make this plugin work with the latest version of `connect-redis` will fail since `express-session` is a peer dependency of it since version `7.0.0`. RedisStore is extending `Store` from `express-session` and also using the `SessionData` type from it as you can see here: https://github.com/tj/connect-redis/blob/master/index.ts

This leads to the following issue when trying to run a project without `express-session` installed:

```
Error: Cannot find module 'express-session'
```

This can be fixed by downgrading the `connect-redis` version to `v6.1.3`

### Steps to Reproduce

1. Set up a project with Fastify, @fastify/session and `connect-redis`
2. Run the project
3. You should get the error message mentioned above

### Expected Behavior

_No response_