doc: fix unordered error anchors

PR-URL: nodejs#55242
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: aduh95

doc/api/errors.md

@@ -1295,18 +1295,20 @@ added: v16.7.0
 
 When using [`fs.cp()`][], `src` or `dest` pointed to an invalid path.
 
-<a id="ERR_FS_CP_FIFO_PIPE"></a>
+<a id="ERR_HTTP_BODY_NOT_ALLOWED"></a>
 
 ### `ERR_HTTP_BODY_NOT_ALLOWED`
 
 An error is thrown when writing to an HTTP response which does not allow
-contents. <a id="ERR_HTTP_BODY_NOT_ALLOWED"></a>
+contents.
+
+<a id="ERR_HTTP_CONTENT_LENGTH_MISMATCH"></a>
 
 ### `ERR_HTTP_CONTENT_LENGTH_MISMATCH`
 
 Response body size doesn't match with the specified content-length header value.
 
-<a id="ERR_HTTP_CONTENT_LENGTH_MISMATCH"></a>
+<a id="ERR_FS_CP_FIFO_PIPE"></a>
 
 ### `ERR_FS_CP_FIFO_PIPE`