[SP-2025] Add castAI and remove Tecnocomp sponsors (#15563)

* sp 2025 add castAI Sponsor

* remove tecnocomp sponsor

Author: greglixandrao

data/events/2025/sao-paulo/main.yml

@@ -205,8 +205,8 @@ sponsors:
     level: platinum
   - id: fluidattacks
     level: platinum
-  - id: tecnocomp
-    level: platinum
+  - id: castai
+    level: gold
   - id: novatec
     level: community
   - id: 3dcomtech