Update sponsors section in README.md

Removed outdated sponsor links and added new sponsor images.

Author: typicode

README.md

@@ -82,16 +82,11 @@ Run `json-server --help` for a list of options
 | :---: |
 | <a href="https://mockend.com/" target="_blank"><img src="https://jsonplaceholder.typicode.com/mockend.svg" height="100px"></a> |
 | <a href="https://zuplo.link/json-server-gh"><img src="https://github.com/user-attachments/assets/adfee31f-a8b6-4684-9a9b-af4f03ac5b75" height="100px"></a> |
-
-| Sponsors |
-| :---: |
-| <a href="https://konghq.com/products/kong-konnect?utm_medium=referral&utm_source=github&utm_campaign=platform&utm_content=json-server"><img src="https://github.com/typicode/json-server/assets/5502029/e8d8ecb2-3c45-4f60-92d0-a060b820fa7f" height="75px"></a> |
+| <a href="https://www.mintlify.com/"><img src="https://github.com/user-attachments/assets/8a2944b4-002f-471b-9547-9a1ebfbec0b7" height="100px"></a> |
 
 | Sponsors | |
 | :---: | :---: |
 | <a href="https://www.storyblok.com/" target="_blank"><img src="https://github.com/typicode/json-server/assets/5502029/c6b10674-4ada-4616-91b8-59d30046b45a" height="35px"></a> | <a href="https://betterstack.com/" target="_blank"><img src="https://github.com/typicode/json-server/assets/5502029/44679f8f-9671-470d-b77e-26d90b90cbdc" height="35px"></a> |
-| <a href="https://route4me.com"><img src="https://github.com/user-attachments/assets/4eab0bac-119e-4b27-8183-8b136190b776" height="35px" alt="Delivery Routing Software and Route Optimization Software"></a> | <a href="https://www.speechanddebate.org"><img src="https://github.com/user-attachments/assets/cc7980e4-2147-4499-8de4-4d0c265d0c07" height="35px"></a> |
-
 
 [Become a sponsor and have your company logo here](https://github.com/users/typicode/sponsorship)