doc: fix typo in language tag documentation
Commit 1e16af8ab5 accidentally mistyped 'language' in one place.
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/913b3da6aeda3f887b8796d8098d7227d32580b9
Modified Files
--------------
doc/src/sgml/charset.sgml | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)