optimize doc

Signed-off-by: xinyual <xinyual@amazon.com>

Author: xinyual

docs/user/ppl/functions/json.rst

@@ -10,48 +10,28 @@ JSON Functions
 
 
 
-JSON Path
----------
-
-Description
->>>>>>>>>>>
-
-All JSON paths used in JSON functions follow the format `<key1>{<index1>}.<key2>{<index2>}...`.
-
-Each `<key>` represents a field name. The `{<index>}` part is optional and is only applicable when the corresponding key refers to an array.
-
-For example::
-
-    a{2}.b{0}
-
-This refers to the element at index 0 of the `b` array, which is nested inside the element at index 2 of the `a` array.
-
-Notes:
-
-- The `{<index>}` notation applies **only when** the associated key points to an array.
-- `{}` (without a specific index) is interpreted as a **wildcard**, equivalent to `{*}`, meaning "all elements" in the array at that level.
-
 
 JSON Path
 ---------
 
 Description
 >>>>>>>>>>>
 
-All JSON paths used in JSON functions follow the format `<key1>{<index1>}.<key2>{<index2>}...`.
+All JSON paths used in JSON functions follow the format ``<key1>{<index1>}.<key2>{<index2>}...``.
 
-Each `<key>` represents a field name. The `{<index>}` part is optional and is only applicable when the corresponding key refers to an array.
+Each ``<key>`` represents a field name. The ``{<index>}`` part is optional and is only applicable when the corresponding key refers to an array.
 
 For example::
 
     a{2}.b{0}
 
-This refers to the element at index 0 of the `b` array, which is nested inside the element at index 2 of the `a` array.
+This refers to the element at index 0 of the ``b`` array, which is nested inside the element at index 2 of the ``a`` array.
 
 Notes:
 
-- The `{<index>}` notation applies **only when** the associated key points to an array.
-- `{}` (without a specific index) is interpreted as a **wildcard**, equivalent to `{*}`, meaning "all elements" in the array at that level.
+1. The ``{<index>}`` notation applies **only when** the associated key points to an array.
+
+2. ``{}`` (without a specific index) is interpreted as a **wildcard**, equivalent to ``{*}``, meaning "all elements" in the array at that level.
 
 JSON
 ----------