Update api/v2/incidents/id/attachment endpoints documentation

[api-clients-generation-pipeline]

See DataDog/datadog-api-spec#4757 Test branch datadog-api-spec/test/emilia/update-attachment-docs

[datadog-official]

⚠️ Tests

✨ Fix all issues with Cursor

⚠️ Warnings

🧪 4 Tests failed

    List incident attachments returns "OK" response from Incidents at features/v2/incidents.feature (Fix with Cursor)

    List incident attachments returns "OK" response from Incidents at features/v2/incidents.feature (Fix with Cursor)

    Update incident attachment returns "OK" response from Incidents at features/v2/incidents.feature (Fix with Cursor)

Update incident attachment returns "OK" response from Incidents at features/v2/incidents.feature (Datadog) (Fix with Cursor)

There are unused HTTP interactions left in the cassette:
  - [post https://api.datadoghq.com/api/v2/incidents/c7adbc1c-2c8c-52ab-92aa-a439d1f93c3e/attachments] => [201 "{\"data\":{\"id\":\"08ef0ddf-6eb6-4491-b510-976611e67ce7\",\"type\":\"incident_attachment"]
  - [patch https://api.datadoghq.com/api/v2/incidents/c7adbc1c-2c8c-52ab-92aa-a439d1f93c3e/attachments/08ef0ddf-6eb6-4491-b510-976611e67ce7] => [200 "{\"data\":{\"id\":\"08ef0ddf-6eb6-4491-b510-976611e67ce7\",\"type\":\"incident_attachment"]
  - [delete https://api.datadoghq.com/api/v2/incidents/c7adbc1c-2c8c-52ab-92aa-a439d1f93c3e/attachments/08ef0ddf-6eb6-4491-b510-976611e67ce7] => [204 ""]

View all

ℹ️ Info

❄️ No new flaky tests detected

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 3ebac13 | Docs | Datadog PR Page | Was this helpful? Give us feedback!}