Minor code cleanup in custom telemetry

```
https://github.com/joshsoftware/minion-agent/blob/master/src/minion/agent/telemetry.cr#L32
```

Clean that up to look like this:

```
Process.run(%(#{telemetry.command} "${@}"), shell: true, output: output, args: telemetry.args)
```

Open src/minion/agent/telemetry.cr at line 32 and compare the custom telemetry Process.run call with the requested form in the issue. Done means the call matches the shown expression while preserving the existing telemetry command, arguments, output, and shell behavior.

Written by the indexing model from the issue text.