test: fix typo in test-inspector-cluster-port-clash.js

PR-URL: #17782
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>

test/known_issues/test-inspector-cluster-port-clash.js

@@ -23,7 +23,7 @@ if (process.config.variables.v8_enable_inspector === 0) {
 const cluster = require('cluster');
 const net = require('net');
 
-common.crashOnUnhandleRejection();
+common.crashOnUnhandledRejection();
 
 const ports = [process.debugPort];
 const clashPort = process.debugPort + 2;