test: fix test-tty-get-color-depth

If getTTYfd returns 0, and stdin is not writable (like on Windows),
trying to create WriteStream will fail. This commit fixes that by
skipping fd 0.

PR-URL: #18478
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-tty-get-color-depth.js

@@ -10,7 +10,7 @@ const { WriteStream } = require('tty');
 
 // Do our best to grab a tty fd.
 function getTTYfd() {
-  const ttyFd = [0, 1, 2, 4, 5].find(tty.isatty);
+  const ttyFd = [1, 2, 4, 5].find(tty.isatty);
   if (ttyFd === undefined) {
     try {
       return openSync('/dev/tty');