test: fix a typo on test-fs-read-optional-params

PR-URL: #32461
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Rich Trott <rtrott@gmail.com>

test/parallel/test-fs-read-optional-params.js

@@ -27,7 +27,7 @@ fs.read(fd, common.mustCall((err, bytesRead, buffer) => {
 fs.read(fd, {
   buffer: bufferAsOption,
   offset: 0,
-  lenght: bufferAsOption.length,
+  length: bufferAsOption.length,
   position: 0
 },
         common.mustCall((err, bytesRead, buffer) => {