[chore] Suppress renovatebot edit notification (open-telemetry#29844)

![image](https://github.com/open-telemetry/opentelemetry-collector-contrib/assets/12352919/0797a8fe-3eca-484d-b8d1-4f8a6e6994db)

That comment will appear on every single renovatebot PR since we use
opentlemetrybot to do the `make gotidy`. They don't provide value so
this PR suppresses them.

renovate.json

@@ -76,5 +76,6 @@
  "github.com/mattn/go-ieproxy",
  "github.com/DataDog/datadog-agent/pkg/trace/exportable"
  ],
- "prConcurrentLimit": 50
+ "prConcurrentLimit": 50,
+ "suppressNotifications": ["prEditedNotification"]
  }