docs(sponsorship): update Open Collective slug to ameva-fund in README.md

Author: uno-km

README.md

@@ -7,7 +7,7 @@
 [![Python](https://img.shields.io/badge/Python-3.9_|_3.10_|_3.11_|_3.12_|_3.13-3776ab?style=for-the-badge&logo=python&logoColor=white)](https://pypi.org/project/ameva/)
 [![WebGPU](https://img.shields.io/badge/WebGPU-Pure_WGSL_Compute-blueviolet?style=for-the-badge&logo=webgpu)](https://uno-km.vercel.app/lib/forge/)
 [![Tests](https://img.shields.io/badge/Tests-292%2F292_Passed_(100%25)-brightgreen?style=for-the-badge)](https://uno-km.vercel.app/lib/forge/benchmarks.html)
-[![Open Collective](https://img.shields.io/badge/Open_Collective-AOSF_Fund-004499?style=flat&logo=opencollective)](https://opencollective.com/ameva-foundation)
+[![Open Collective](https://img.shields.io/badge/Open_Collective-AOSF_Fund-004499?style=flat&logo=opencollective)](https://opencollective.com/ameva-fund)
 [![GitHub Sponsors](https://img.shields.io/badge/GitHub_Sponsors-uno--km-ea4aaa?style=flat&logo=githubsponsors)](https://github.com/sponsors/uno-km)
 [![License](https://img.shields.io/badge/License-Apache--2.0-blue?style=for-the-badge)](LICENSE)
 [![AMEVA Foundation](https://img.shields.io/badge/Foundation-AOSF_Tier_1-orange?style=for-the-badge)](https://uno-km.vercel.app/docs/foundation/)
@@ -121,6 +121,6 @@ Apache-2.0 / MIT License © 2026 AMEVA Open-Source Foundation (AOSF). All Rights
 
 AMEVA is an independent open-source public good governed under the **AMEVA Open-Source Foundation (AOSF)**. All sponsorship funds are 100% publicly audited and dedicated to physical ARM64 testbeds and CI/CD GPU runners.
 
-- **Open Collective (Non-Profit 501(c)(6))**: [https://opencollective.com/ameva-foundation](https://opencollective.com/ameva-foundation)
+- **Open Collective (Non-Profit 501(c)(6))**: [https://opencollective.com/ameva-fund](https://opencollective.com/ameva-fund)
 - **GitHub Sponsors**: [https://github.com/sponsors/uno-km](https://github.com/sponsors/uno-km)
 - **Official Foundation Portal**: [https://uno-km.vercel.app/docs/foundation/sponsorship.html](https://uno-km.vercel.app/docs/foundation/sponsorship.html)