docs(planning_debug_tools): fix .pages to make the deploy successful (autowarefoundation#6465)

Signed-off-by: Kento Yabuuchi <kento.yabuuchi.2@tier4.jp>

Author: KYabuuchi

planning/.pages

@@ -77,8 +77,8 @@ nav:
   - 'Additional Tools':
     - 'RTC Replayer': planning/rtc_replayer
     - 'Planning Debug Tools':
-      - ['About Planning Debug Tools'](https://github.com/autowarefoundation/autoware_tools/tree/main/planning_debug_tools)
-      - ['Stop Reason Visualizer'](https://github.com/autowarefoundation/autoware_tools/tree/main/planning_debug_tools/doc-stop-reason-visualizer)
+      - 'About Planning Debug Tools': https://github.com/autowarefoundation/autoware_tools/tree/main/planning/planning_debug_tools
+      - 'Stop Reason Visualizer': https://github.com/autowarefoundation/autoware_tools/blob/main/planning/planning_debug_tools/doc-stop-reason-visualizer.md
     - 'Planning Test Utils': planning/planning_test_utils
     - 'Planning Topic Converter': planning/planning_topic_converter
     - 'Planning Validator': planning/planning_validator