chore(autoware_multi_object_tracker): fix autoware univserse documentation page (#9772)

* feat: Add descriptions for confidence thresholds in multi_object_tracker_node schema

Signed-off-by: Taekjin LEE <taekjin.lee@tier4.jp>

* feat: Update multi_object_tracker_node schema with confidence threshold descriptions

Signed-off-by: Taekjin LEE <taekjin.lee@tier4.jp>

---------

Signed-off-by: Taekjin LEE <taekjin.lee@tier4.jp>

Author: technolojin

perception/autoware_multi_object_tracker/README.md

@@ -69,7 +69,12 @@ Multiple inputs are pre-defined in the input channel parameters (described below
 
 ### Core Parameters
 
+- Node
+
 {{ json_to_markdown("perception/autoware_multi_object_tracker/schema/multi_object_tracker_node.schema.json") }}
+
+- Association
+
 {{ json_to_markdown("perception/autoware_multi_object_tracker/schema/data_association_matrix.schema.json") }}
 
 #### Simulation parameters

perception/autoware_multi_object_tracker/schema/multi_object_tracker_node.schema.json

@@ -86,38 +86,45 @@
           "properties": {
             "UNKNOWN": {
               "type": "number",
+              "description": "Number of measurements to consider tracker as confident for unknown object classes.",
               "default": 3
             },
             "CAR": {
               "type": "number",
+              "description": "Number of measurements to consider tracker as confident for car object classes.",
               "default": 3
             },
             "TRUCK": {
               "type": "number",
+              "description": "Number of measurements to consider tracker as confident for truck object classes.",
               "default": 3
             },
             "BUS": {
               "type": "number",
+              "description": "Number of measurements to consider tracker as confident for bus object classes.",
               "default": 3
             },
             "TRAILER": {
               "type": "number",
+              "description": "Number of measurements to consider tracker as confident for trailer object classes.",
               "default": 3
             },
             "MOTORBIKE": {
               "type": "number",
+              "description": "Number of measurements to consider tracker as confident for motorbike object classes.",
               "default": 3
             },
             "BICYCLE": {
               "type": "number",
+              "description": "Number of measurements to consider tracker as confident for bicycle object classes.",
               "default": 3
             },
             "PEDESTRIAN": {
               "type": "number",
+              "description": "Number of measurements to consider tracker as confident for pedestrian object classes.",
               "default": 3
             }
-          },
-          "description": "Number of measurements to consider tracker as confident for different object classes."
+          }
         },
         "publish_processing_time": {
           "type": "boolean",