Update doc and notebook (microsoft#946)

* update

* update doc

---------

Co-authored-by: “skzhang1” <“[email protected]”>

Author: skzhang1

notebook/tune_lexicographic.ipynb

@@ -1,10 +1,11 @@
 {
  "cells": [
   {
+   "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Tune neural networks with leicographic preference across objectives\n",
+    "# Tune neural networks with lexicographic preference across objectives\n",
     "This example is to tune neural networks model with two objectives \"error_rate\", \"flops\" on FashionMnist dataset. \n",
     "\n",
     "**Requirements.** This notebook requires:"

website/docs/Use-Cases/Tune-User-Defined-Function.md

@@ -662,3 +662,15 @@ For more technical details, please check our papers.
     booktitle={ICLR'21},
 }
 ```
+
+* [Targeted Hyperparameter Optimization with Lexicographic Preferences Over Multiple Objectives](https://openreview.net/forum?id=0Ij9_q567Ma). Shaokun Zhang, Feiran Jia, Chi Wang, Qingyun Wu. ICLR 2023 (notable-top-5%).
+
+```bibtex
+@inproceedings{zhang2023targeted,
+    title={Targeted Hyperparameter Optimization with Lexicographic Preferences Over Multiple Objectives},
+    author={Shaokun Zhang and Feiran Jia and Chi Wang and Qingyun Wu},
+    booktitle={International Conference on Learning Representations},
+    year={2023},
+    url={https://openreview.net/forum?id=0Ij9_q567Ma}
+}
+```