Fix broken links - #604

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Fetched 13 OpenApi file(s):
  - api-reference/agents/openapi.json
  - api-reference/alerts/openapi.json
  - api-reference/chat/openapi.json
  - api-reference/concurrent-calls/openapi.json
  - api-reference/conversations/v1/openapi.json
  - api-reference/conversations/v3/openapi.json
  - api-reference/debug-chat/openapi.json
  - api-reference/dni/openapi.json
  - api-reference/external-events/openapi.json
  - api-reference/handoff/openapi.json
  - api-reference/outbound/openapi.json
  - api-reference/webhooks/openapi.json
  - api-reference/webrtc-gateway/openapi.yaml
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Successfully updated API reference metadata.
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