[Bug]: 404 Notfound - Install the OpenShell governance skill and use it from your agent's code

### Package

Documentation

### Description

https://microsoft.github.io/agent-governance-toolkit/integrations/openshell/?h=skill#option-a-governance-skill-inside-the-sandbox-python-library

the link in Install the [OpenShell governance skill](https://microsoft.github.io/agent-governance-toolkit/agent-governance-python/agentmesh-integrations/openshell-skill/) and use it from your agent's code:
returns 404 not found

### Steps to Reproduce

Click on the OpenShell link

### Environment

not relevant

### Logs / Error Output

```shell

```

### Code of Conduct

- [x] I agree to follow the Microsoft Open Source Code of Conduct

Start with the OpenShell integration documentation at https://microsoft.github.io/agent-governance-toolkit/integrations/openshell/. Follow the “Install the OpenShell governance skill” link and update the documentation so it no longer returns 404, then verify the link resolves successfully.

Written by the indexing model from the issue text.