deps: update simdjson to 5.1.1

PR-URL: #67332
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: nodejs-github-bot

deps/simdjson/simdjson.cpp

@@ -1,4 +1,4 @@
-/* auto-generated on 2026-10-29 18:49:29 -0400. version 5.1.0 Do not edit! */
+/* auto-generated on 2026-10-31 19:14:12 -0400. version 5.1.1 Do not edit! */
 /* including simdjson.cpp:  */
 /* begin file simdjson.cpp */
 #define SIMDJSON_SRC_SIMDJSON_CPP