doc: Fix two queries related to jsonb functions

These have been updated by the revert done in 2f2b18b, but the
pre-revert state was correct.  Note that the result was incorrectly
formatted in the first case.

Author: Erik Rijkers
Discussion: https://postgr.es/m/13777e96-24b6-396b-cb16-8ad01b6ac130@xs4all.nl
Backpatch-through: 13

Author: michaelpq

doc/src/sgml/func.sgml

@@ -15688,7 +15688,7 @@ table2-mapping
        </para>
        <para>
         <literal>jsonb_set_lax('[{"f1":1,"f2":null},2,null,3]', '{0,f1}', null)</literal>
-        <returnvalue>[{"f1":null,"f2":null},2,null,3]</returnvalue>
+        <returnvalue>[{"f1": null, "f2": null}, 2, null, 3]</returnvalue>
        </para>
        <para>
         <literal>jsonb_set_lax('[{"f1":99,"f2":null},2]', '{0,f3}', null, true, 'return_target')</literal>
@@ -15927,7 +15927,7 @@ table2-mapping
         comparisons.
        </para>
        <para>
-        <literal>jsonb_path_exists_tz('["2015-08-01 12:00:00 -05"]', '$[*] ? (@.datetime() &lt; "2015-08-02".datetime())')</literal>
+        <literal>jsonb_path_exists_tz('["2015-08-01 12:00:00-05"]', '$[*] ? (@.datetime() &lt; "2015-08-02".datetime())')</literal>
         <returnvalue>t</returnvalue>
        </para></entry>
       </row>