Merge pull request #3920 from hrittikhere/adopter-docs

docs: Add adopter refrence

ADOPTERS.md

@@ -1,12 +1,7 @@
 # Karmada Adopters
 
-Karmada has been adopted by many companies.
-If you are using Karmada in your organization, please feel free to add your logo to the list!
+Karmada has been adopted by many [organizations](https://karmada.io/adopters/).
 
+If you are using Karmada in your organization, please feel free to add your name to the [list](https://github.com/karmada-io/website/blob/main/docs/casestudies/adopters.md)! We are happy and proud to have you all as part of our community!💖
 
-<img alt="HUAWEICLOUD" width="150px" src="https://karmada.io/img/huawei.png"><img alt="ICBC" width="150px" src="https://karmada.io/img/icbc.png">
-<img alt="SPDBank" width="150px" src="https://karmada.io/img/spdb.png"><img alt="Xiaohongshu" width="150px" src="https://karmada.io/img/xiaohongshu.png">
-
-<img alt="VIPKID" width="150px" src="https://karmada.io/img/VIPKID.png"><img alt="Qutoutiao" width="150px" src="https://karmada.io/img/qutoutiao.png">
-<img alt="FAW" width="150px" src="https://karmada.io/img/faw.png"><img alt="T3" width="150px" src="https://karmada.io/img/T3-logo2.png">
-
+To join this list, please follow [these instructions](https://github.com/karmada-io/website/tree/main/adopters/README.md).