Apply capitalization to the PostgreSQL database name

Co-authored-by: Johannes Maron <johannes@maron.family>
Co-authored-by: Matthias Kestenholz <matthiask@fastmail.com>

Author: matthiask

docs/changes.rst

@@ -32,7 +32,7 @@ Pending
   ``debug_toolbar_urls``.
 * Fixed cookie ``expires`` calculation in ``djdt.cookie.set``.
 * Account for the new ``CULL_PROBABILITY`` in Django 6.2 in tests.
-* Support Django 6.2's handling of booleans for non-postgresql databases.
+* Support Django 6.2's handling of booleans for non-PostgreSQL databases.
 
 6.3.0 (2026-04-01)
 ------------------

docs/spelling_wordlist.txt

@@ -48,7 +48,6 @@ multi
 neo
 nothreading
 paddings
-postgresql
 pre
 profiler
 psycopg