add a few headings and captions

Author: renetapopova

modules/ROOT/pages/monitoring/logging.adoc

@@ -1151,6 +1151,8 @@ to using the `JsonTemplateLayout`:
 </RollingRandomAccessFile>
 ----
 
+==== JSON format log entries
+
 The `QueryLogJsonLayout.json` template mimics the 4.x layout and contains the following information:
 
 .JSON format log entries
@@ -1175,7 +1177,7 @@ The `QueryLogJsonLayout.json` template mimics the 4.x layout and contains the fo
 
 If the type of the log entry is `query`, these additional fields are available:
 
-.JSON format log entries
+.JSON format log entries for log type `query`
 [cols="1m,3a", options="header"]
 |===
 | Name
@@ -1240,8 +1242,8 @@ Included when xref:configuration/configuration-settings.adoc#config_db.logs.quer
 Included when applicable.
 
 | errorInfo
-| (only from version 5.25) GQL error information as a JSON object.
-See xref:monitoring/logging.adoc#gql-error-information[GQL error information] for details on the contents of the `errorInfo` JSON object.
+| label:new[Introduced in 5.25] GQL error information as a JSON object.
+See <<gql-error-information, GQL error information>> for details on the contents of the `errorInfo` JSON object.
 
 | transactionId
 | The transaction ID of the running query.
@@ -1254,7 +1256,7 @@ Included when xref:configuration/configuration-settings.adoc#config_db.logs.quer
 
 If the type of the log entry is `transaction`, the following additional fields are available:
 
-.JSON format log entries
+.JSON format log entries for log type `transaction`
 [cols="1m,3a", options="header"]
 |===
 | Name
@@ -1281,16 +1283,17 @@ Either same as `authenticatedUser` or an impersonated user.
 [[gql-error-information]]
 ==== GQL error information
 
-The query log includes GQL error information under the JSON object `errorInfo`.
+The query log includes the GQL error information under the JSON object `errorInfo`.
 `errorInfo` can contain the following elements:
 
 * `GQLSTATUS` -- A 5-character long alpha-numeric code identifying the error.
 * `statusDescription` -- A message describing the error.
 * `classification` -- The type of error representing a division of client, transient, and database errors.
-* `position` -- The position (a JSON object containing a field for `column`, `offset` and `line`) in the query where this error occurred.
+* `position` -- The position (a JSON object containing a field for `column`, `offset`, and `line`) in the query where this error occurred.
 * `cause` -- A JSON object containing the `errorInfo` JSON object of the cause of the current `errorInfo` JSON object.
 
 The following are examples of the `errorInfo` JSON object:
+
 .`errorInfo` JSON object of a database error
 [source%linenums,xml,options="nowrap",highlight=4]
 ----