`GetDebugInfo` doesn't menction the CLI

[GetDebugInfo](https://lightning.engineering/api-docs/api/lnd/lightning/get-debug-info/) says

```
# There is no CLI command for this RPC
```

however

```
litd@alice-7d8cc9cddc-gqm4b:/$ lncli -h|grep getdebuginfo
getdebuginfo Returns debug information related to the active daemon.
litd@alice-7d8cc9cddc-gqm4b:/$
```

shows there actually is one.

Open the GetDebugInfo API documentation page and compare its note about CLI support with the lncli help output shown in the issue. Update the inaccurate note to reflect that a getdebuginfo command exists, then verify the rendered page no longer claims that no CLI command is available.

Written by the indexing model from the issue text.