🔧 Update sponsors, LambdaTest changes to TestMu AI

docs/en/data/sponsors.yml

@@ -65,9 +65,9 @@ bronze:
   # - url: https://testdriven.io/courses/tdd-fastapi/
   #   title: Learn to build high-quality web apps with best practices
   #   img: https://fastapi.tiangolo.com/img/sponsors/testdriven.svg
-  - url: https://lambdatest.com/?utm_source=fastapi&utm_medium=partner&utm_campaign=sponsor&utm_term=opensource&utm_content=webpage
-    title: LambdaTest, AI-Powered Cloud-based Test Orchestration Platform
-    img: https://fastapi.tiangolo.com/img/sponsors/lambdatest.png
+  - url: https://www.testmu.ai/?utm_source=fastapi&utm_medium=partner&utm_campaign=sponsor&utm_term=opensource&utm_content=webpage
+    title: TestMu AI. The Native AI-Agentic Cloud Platform to Supercharge Quality Engineering.
+    img: https://fastapi.tiangolo.com/img/sponsors/testmu.png
   - url: https://requestly.com/fastapi
     title: All-in-one platform to Test, Mock and Intercept APIs. Built for speed, privacy and offline support.
     img: https://fastapi.tiangolo.com/img/sponsors/requestly.png