fix(docs): update outdated ref to NSP (#24925)

removes an outdated reference to Node Security Project, which was acquired by npm some time ago. The new workflow for the same process (now the npm advisories page) has been added.

SECURITY.md

@@ -6,7 +6,7 @@ To report a security issue, email [[email protected]](mailto:security@elec
 
 The Electron team will send a response indicating the next steps in handling your report. After the initial reply to your report, the security team will keep you informed of the progress towards a fix and full announcement, and may ask for additional information or guidance.
 
-Report security bugs in third-party modules to the person or team maintaining the module. You can also report a vulnerability through the [Node Security Project](https://nodesecurity.io/report).
+Report security bugs in third-party modules to the person or team maintaining the module. You can also report a vulnerability through the [npm contact form](https://www.npmjs.com/support) by selecting "I'm reporting a security vulnerability".
 
 ## The Electron Security Notification Process