doc: reserve 125 for Electron 31

PR-URL: #52379
Reviewed-By: Ulises Gascón <ulisesgascongonzalez@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>

doc/abi_version_registry.json

@@ -1,5 +1,6 @@
 {
   "NODE_MODULE_VERSION": [
+    { "modules": 125,"runtime": "electron", "variant": "electron",             "versions": "31" },
     { "modules": 124,"runtime": "node",     "variant": "v8_12.2",              "versions": "22.0.0-pre" },
     { "modules": 123,"runtime": "electron", "variant": "electron",             "versions": "30" },
     { "modules": 122,"runtime": "node",     "variant": "v8_11.9",              "versions": "22.0.0-pre" },