pgsql: Fix some typos in jsonpath documentation

Fix some typos in jsonpath documentation Discussion: https://postgr.es/m/8B7FA3B4-328D-43D7-95A8-37B8891B8C78%40winand.at Author: Markus Winand Backpatch-through: 12 Branch -- REL_12_STABLE Details --- https://git.postgresql.org/pg/commitdiff/53d467246589de631ce1846105f990099219e737 Mod

pgsql: Fix some typos in jsonpath documentation

Fix some typos in jsonpath documentation Discussion: https://postgr.es/m/8B7FA3B4-328D-43D7-95A8-37B8891B8C78%40winand.at Author: Markus Winand Backpatch-through: 12 Branch -- master Details --- https://git.postgresql.org/pg/commitdiff/1f33f211bc531d257f84fefb9208dd43e8718972 Modified F