remove autoware prefix from autoware planning test manager

Signed-off-by: Muhammad Zulfaqar Azmi <zulfaqar.azmi@tier4.jp>

Author: zulfaqar-azmi-t4

planning/.pages

@@ -80,6 +80,6 @@ nav:
       - '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
-    - 'Autoware Planning Test Manager': planning/autoware_planning_test_manager
+    - 'Planning Test Manager': planning/autoware_planning_test_manager
     - 'Planning Topic Converter': planning/planning_topic_converter
     - 'Planning Validator': planning/planning_validator