add null as a value for --multiline-fields

Author: renetapopova

modules/ROOT/pages/tools/neo4j-admin/neo4j-admin-import.adoc

@@ -258,6 +258,7 @@ It can also be specified as a percentage of the available memory, for example `7
 
 |--multiline-fields[=true\|false]
 |Whether or not fields from an input source can span multiple lines, i.e. contain newline characters.
+| null
 
 |--multiline-fields-format=v1\|v2
 |label:new[Introduced in 5.26] Controls the parsing of input source that can span multiple lines, i.e. contain newline characters. When set to v1, the value for `--multiline-fields` can only be true or false. When set to v2, the value for `--multiline-fields` should be the list of files that contain multiline fields.
@@ -796,6 +797,7 @@ It can also be specified as a percentage of the available memory, for example `7
 
 |--multiline-fields[=true\|false]
 |Whether or not fields from an input source can span multiple lines, i.e. contain newline characters.
+| null
 
 |--multiline-fields-format=v1\|v2
 |label:new[Introduced in 5.26] Controls the parsing of input source that can span multiple lines, i.e. contain newline characters. When set to v1, the value for `--multiline-fields` can only be true or false. When set to v2, the value for `--multiline-fields` should be the list of files that contain multiline fields.