[FIX] survey: fix conditional questions navigation on survey

This commit remove unecessary array around triggered_questions_by_answer values
that is used at the client side to find inactive questions.

Before this fix, when looping through every elements of
triggered_questions_by_answer, we got an array, instead of each question id
separately.

PR #48442
Task ID 2208574

addons/survey/controllers/main.py

@@ -284,9 +284,9 @@ class Survey(http.Controller):
                     if triggering_answer_by_question[question]
                 },
                 'triggered_questions_by_answer': {
-                    answer.id: [
-                        triggered_questions_by_answer[answer].ids
-                    ] for answer in triggered_questions_by_answer.keys()},
+                    answer.id: triggered_questions_by_answer[answer].ids
+                    for answer in triggered_questions_by_answer.keys()
+                },
                 'selected_answers': selected_answers.ids
             })