[Bug]: Demo Links broken

### What happened?

The "Next-Generation" demos have broken links to sites that dont work

### Steps to reproduce

1. Navigate to https://www.jaegertracing.io/demo/
2. Click any of the Next-Generation Links
3. Get 404

### Expected behavior

1. Navigate to https://www.jaegertracing.io/demo/
2. Click any of the Next-Generation Links
3. See a nice demo

### Relevant log output

```shell

```

### Screenshot

_No response_

### Additional context

_No response_

### Jaeger backend version

_No response_

### SDK

_No response_

### Pipeline

_No response_

### Stogage backend

_No response_

### Operating system

_No response_

### Deployment model

_No response_

### Deployment configs

```shell

```

Start at the demo page linked in the report and inspect the Next-Generation links that return 404. Trace those links to their documentation source, update the broken destinations, and verify that each link opens a working demo rather than a 404 page.

Written by the indexing model from the issue text.