docs: [OrchestrationAirflow] A comment for field connection_type in message .google.cloud.orchestration.airflow.service.v1.NetworkingConfig is changed (#8169)

* docs: A comment for field `connection_type` in message `.google.cloud.orchestration.airflow.service.v1.NetworkingConfig` is changed

PiperOrigin-RevId: 738128429

Source-Link: googleapis/googleapis@1ce9037

Source-Link: googleapis/googleapis-gen@e5617ba
Copy-Tag: eyJwIjoiT3JjaGVzdHJhdGlvbkFpcmZsb3cvLk93bEJvdC55YW1sIiwiaCI6ImU1NjE3YmFmMjM2YzRmMTQ2YTQwZWM1NzJmNTk0NWY0OTkxN2U2M2IifQ==

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]