Update stubs

Author: phpstan-bot

Php8StubsMap.php

@@ -2741,6 +2741,7 @@ public function __construct(int $phpVersionId)
 				'pg_exit_pipeline_mode' => 'stubs/ext/pgsql/pg_exit_pipeline_mode.php',
 				'pg_pipeline_status' => 'stubs/ext/pgsql/pg_pipeline_status.php',
 				'pg_pipeline_sync' => 'stubs/ext/pgsql/pg_pipeline_sync.php',
+				'pg_send_flush_request' => 'stubs/ext/pgsql/pg_send_flush_request.php',
 				'pg_set_error_context_visibility' => 'stubs/ext/pgsql/pg_set_error_context_visibility.php',
 				'posix_eaccess' => 'stubs/ext/posix/posix_eaccess.php',
 				'posix_fpathconf' => 'stubs/ext/posix/posix_fpathconf.php',

stubs/ext/pgsql/pg_send_flush_request.php

@@ -0,0 +1,6 @@
+<?php 
+
+#[\Since('8.3')]
+function pg_send_flush_request(\PgSql\Connection $connection): bool
+{
+}