Reverting

Author: n-o-u-r-h-a-n

core-services/prompt-registry/src/main/java/com/sap/ai/sdk/prompt/registry/model/PromptTemplateSubstitutionResponse.java

@@ -40,7 +40,7 @@ public class PromptTemplateSubstitutionResponse
   private final Map<String, Object> cloudSdkCustomFields = new LinkedHashMap<>();
 
   /** Default constructor for PromptTemplateSubstitutionResponse. */
-  public PromptTemplateSubstitutionResponse() {}
+  protected PromptTemplateSubstitutionResponse() {}
 
   /**
    * Set the parsedPrompt of this {@link PromptTemplateSubstitutionResponse} instance and return the