Fix more checkstyle violations

Author: Jonas-Isr

sample-code/spring-app/src/main/java/com/sap/ai/sdk/app/services/OpenAiServiceV2.java

@@ -53,6 +53,7 @@ public OpenAiChatCompletionResponse chatCompletion(@Nonnull final String prompt)
   /**
    * Asynchronous stream of an OpenAI chat request
    *
+   * @param message The message to send to the assistant
    * @return the emitter that streams the assistant message response
    */
   @Nonnull
@@ -66,6 +67,7 @@ public Stream<OpenAiChatCompletionDelta> streamChatCompletionDeltas(
   /**
    * Asynchronous stream of an OpenAI chat request
    *
+   * @param message The message to send to the assistant
    * @return the emitter that streams the assistant message response
    */
   @Nonnull