Update opentelemetry-specification version to v1.40.0

[opentelemetrybot]

Update opentelemetry-specification version to v1.40.0.

See https://github.com/open-telemetry/opentelemetry-specification/releases/tag/v1.40.0.

---

Edits (@chalin) - PR patched

References:

• Invalid hash ID in path logs/data-model/#event-name opentelemetry-specification#4338
• Change event.name attribute into top-level event name field opentelemetry-specification#4320 (review)
• Add cross-file anchor link check  semantic-conventions#1009 (comment)
• https://github.com/open-telemetry/opentelemetry.io/actions/workflows/build-dev.yml

[svrnm]

/fix:all

[opentelemetrybot]

You triggered fix:all action run at https://github.com/open-telemetry/opentelemetry.io/actions/runs/12311670369

[opentelemetrybot]

fix:all failed or was cancelled. For details, see https://github.com/open-telemetry/opentelemetry.io/actions/runs/12311670369.

[svrnm]

@open-telemetry/spec-sponsors there is a borken link in the spec that trips our link checker

docs/specs/otel/logs/sdk/index.html
  hash does not exist --- docs/specs/otel/logs/sdk/index.html --> /docs/specs/otel/logs/data-model/#event-name
docs/specs/otel/logs/api/index.html
  hash does not exist --- docs/specs/otel/logs/api/index.html --> /docs/specs/otel/logs/data-model/#event-name
  hash does not exist --- docs/specs/otel/logs/api/index.html --> /docs/specs/otel/logs/data-model/#event-name
docs/specs/otel/context/api-propagators/index.html

cc @chalin

[chalin]

All patched up and ready to go! Checks are all green now.