Update ADOPTERS.md (#1429)

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## What this PR does


### Release note

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```release-note
[]
```

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## Summary by CodeRabbit

* **Documentation**
* Added Hidora to the Adopters list, including contact
(@matthieu-robin), date (2025-09-17), and a description highlighting
Hikube’s Swiss-based, multi-datacenter, sovereign cloud capabilities.
Users can reference these details for real-world usage context.
* Updated the table with a spacer row to maintain formatting
consistency.

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ADOPTERS.md

@@ -30,3 +30,5 @@ This list is sorted in chronological order, based on the submission date.
 | [Bootstack](https://bootstack.app/) | @mrkhachaturov | 2024-08-01| At Bootstack, we utilize a Kubernetes operator specifically designed to simplify and streamline cloud infrastructure creation.|
 | [gohost](https://gohost.kz/) | @karabass_off | 2024-02-01 | Our company has been working in the market of Kazakhstan for more than 15 years, providing clients with a standard set of services: VPS/VDC, IaaS, shared hosting, etc. Now we are expanding the lineup by introducing Bare Metal Kubenetes cluster under Cozystack management. |
 | [Urmanac](https://urmanac.com) | @kingdonb | 2024-12-04 | Urmanac is the future home of a hosting platform for the knowledge base of a community of personal server enthusiasts. We use Cozystack to provide support services for web sites hosted using both conventional deployments and on SpinKube, with WASM. |
+| [Hidora](https://hikube.cloud) | @matthieu-robin | 2025-09-17 | Hidora is a Swiss cloud provider delivering managed services and infrastructure solutions through datacenters located in Switzerland, ensuring data sovereignty and reliability. Its sovereign cloud platform, Hikube, is designed to run workloads with high availability across multiple datacenters, providing enterprises with a secure and scalable foundation for their applications based on Cozystack. |
+|