fix: enhance instructions in QuestionGenerationRequestBuilder for question and choice generation

Updated the instructions to clarify that both questions and choices should not be generated from the specified ignored points, improving the overall guidance for the question generation process.

Author: aaronlivy

backend/src/main/java/com/odde/doughnut/services/QuestionGenerationRequestBuilder.java

@@ -85,14 +85,14 @@ private String buildIgnoredPointsInstruction(Note note) {
 
       StringBuilder instruction = new StringBuilder();
       instruction.append(
-          "IMPORTANT: The following points from the note should NOT be used to generate questions. Do NOT create questions based on these points:\n\n");
+          "IMPORTANT: The following points from the note should NOT be used to generate questions and choices. Do NOT create questions and choices based on these points:\n\n");
       for (String point : ignoredPoints) {
         if (point != null && !point.trim().isEmpty()) {
           instruction.append("- ").append(point.trim()).append("\n");
         }
       }
       instruction.append(
-          "\nWhen generating questions, completely avoid referencing or testing knowledge about these excluded points.");
+          "\nWhen generating questions and choices, completely avoid referencing or testing knowledge about these excluded points.");
 
       return instruction.toString();
     } catch (JsonProcessingException e) {