Sanity dashboard logo is broken

https://github.com/DataDog/integrations-core/blob/feb29161f4705707250ee5738c8355eb2a03ddcb/sanity/assets/dashboards/sanity_activity_overview.json#L9-L10 <img width="523" height="258" alt="Image" src="https://github.com/user-attachments/assets/7cdb5ea0-010b-4bdd-8354-ebbd9f79bcfd" />