az vm (Core & Extension) | example links need to be escaped in reference content

### Describe the bug

Please escape these example links in source code so they are corrected in MicrosoftDocs/azure-docs-cli autogenerated reference content.

Example links are needed in reference examples, but they need to be escaped so that GitHub does not treat them like live URLs.

### Example links that need update:
|File name | Build error |
|-|-|
| latest/docs-ref-autogen/vm/boot-diagnostics.yml | Link 'https://your_storage_account_name.blob.core.windows.net/' points to a page that doesn't exist. Check the path or URL and update the link. |
| latest/docs-ref-autogen/vm/unmanaged-disk.yml | Link 'https://mystorage.blob.core.windows.net/vhds/d1.vhd' points to a page that doesn't exist. Check the path or URL and update the link. |

### Related command

az vm

### Errors

404

### Issue script & Debug output

n/a

### Expected behavior

n/a

### Environment Summary

Azure CLI 2.62.0

### Additional context

_No response_