Renamed customization class (#26919)

Author: jpalvarezl

specification/cognitiveservices/OpenAI.Inference/tspconfig.yaml

@@ -29,7 +29,7 @@ options:
     generate-tests: false
     custom-types-subpackage: "implementation.models"
     custom-types: "FunctionCallPreset"
-    customization-class: customization/src/main/java/MyCustomization.java
+    customization-class: customization/src/main/java/ChatCompletionsToolCallCustomizations.java
   "@azure-tools/typespec-ts":
     package-dir: "openai"
     generateMetadata: false