pgsql: doc: TOAST not toast

doc: TOAST not toast

There are different capitializations of "TOAST" around the
documentation and code.  This just changes a few places that were more
obviously inconsistent with similar phrases elsewhere.

Author: Peter Smith <peter.b.smith@fujitsu.com>
Discussion:
https://www.postgresql.org/message-id/flat/CAHut+PtxXLJFhwJFvx+M=Ux8WGHU85XbT3nDqk-aAUS3E5ANCw@mail.gmail.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/83389838827b75dbdc9e4c251e2f57b23bfb2cff

Modified Files
--------------
doc/src/sgml/amcheck.sgml         |  4 ++--
doc/src/sgml/bki.sgml             |  2 +-
doc/src/sgml/catalogs.sgml        |  2 +-
doc/src/sgml/logicaldecoding.sgml |  2 +-
doc/src/sgml/ref/alter_table.sgml |  2 +-
doc/src/sgml/ref/pg_amcheck.sgml  | 12 ++++++------
doc/src/sgml/sepgsql.sgml         |  2 +-
7 files changed, 13 insertions(+), 13 deletions(-)