Docs feedback: Missing examples of setting environment variables on windows

[dehaansa]

URL

https://grafana.com/docs/grafana-cloud/send-data/alloy/reference/cli/environment-variables/

Feedback

Environment variable information is missing examples of how to set them for a Windows environment. Under the registry HKEY_LOCAL_MACHINE\SOFTWARE\GrafanaLabs\Alloy, update the Environment string to have one setting per line.