API: make ns.atExit add the callback to an array instead of setting it (#1059)

src/ScriptEditor/NetscriptDefinitions.d.ts

@@ -7246,7 +7246,7 @@ export interface NS {
    *
    * Add callback to be executed when the script dies.
    */
-  atExit(f: () => void): void;
+  atExit(f: () => void, id?: string): void;
 
   /**
    * Move a file on the target server.