doc: fix typo in fs.md

PR-URL: #50570
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

Author: 3fuyang

doc/api/fs.md

@@ -3784,7 +3784,7 @@ system requests but rather the internal buffering `fs.readFile` performs.
 2. If a file descriptor is specified as the `path`, it will not be closed
    automatically.
 3. The reading will begin at the current position. For example, if the file
-   already had `'Hello World`' and six bytes are read with the file descriptor,
+   already had `'Hello World'` and six bytes are read with the file descriptor,
    the call to `fs.readFile()` with the same file descriptor, would give
    `'World'`, rather than `'Hello World'`.