pgsql: doc: Spell checking

doc: Spell checking

Branch
------
REL_13_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/ffb23488af5e6776935c46370465dcc1704e7540

Modified Files
--------------
contrib/pg_stat_statements/pg_stat_statements.c | 2 +-
doc/src/sgml/backup-manifest.sgml               | 4 ++--
doc/src/sgml/extend.sgml                        | 2 +-
doc/src/sgml/fdwhandler.sgml                    | 2 +-
doc/src/sgml/glossary.sgml                      | 6 +++---
doc/src/sgml/maintenance.sgml                   | 2 +-
doc/src/sgml/monitoring.sgml                    | 2 +-
doc/src/sgml/ref/create_table.sgml              | 4 ++--
doc/src/sgml/ref/pg_dump.sgml                   | 2 +-
doc/src/sgml/ref/pg_verifybackup.sgml           | 6 +++---
doc/src/sgml/ref/pgbench.sgml                   | 2 +-
11 files changed, 17 insertions(+), 17 deletions(-)