test: update windows module load error message

libuv 1.14.0 includes a fix for the "%1 is not a valid Win32
application" error message.

Refs: nodejs/node#14866
PR-URL: nodejs/node#14950
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-module-loading-error.js

@@ -25,7 +25,7 @@ const assert = require('assert');
 const { execSync } = require('child_process');
 
 const errorMessagesByPlatform = {
-  win32: ['%1 is not a valid Win32 application'],
+  win32: ['is not a valid Win32 application'],
   linux: ['file too short', 'Exec format error'],
   sunos: ['unknown file type', 'not an ELF file'],
   darwin: ['file too short'],