Fix PGSQL_TRACE_SUPPRESS_TIMESTAMPS version: 8.3.0 → 8.4.20 (#5422)

Due to a preprocessor guard typo in pgsql.stub.php
(`PQTRACE_SUPPPRESS_TIMESTAMPS` — triple P), this constant was
never registered. Fixed in php-src and will be available from
PHP 8.4.20.

php-src fix: php/php-src#21386

For patch-version notation precedent, see MYSQLI_REFRESH_REPLICA
(Available as of PHP 8.1.2, doc-en PR #1006).

Author: KentarouTakeda

reference/pgsql/constants.xml

@@ -951,7 +951,7 @@
     <simpara>
      To be used with <function>pg_trace</function>,
      the timestamp is not included in the trace's messages.
-     Available as of PHP 8.3.0.
+     Available as of PHP 8.4.20.
     </simpara>
    </listitem>
    </varlistentry>