readme: fix link formatting

2017-01-17 01:17:20 +08:00 · 2017-01-17 01:17:20 +08:00 · 1896381501
commit 1896381501
--- a/README.md
+++ b/README.md
@ -2,7 +2,7 @@

 [![alt text](https://readthedocs.org/projects/docs/badge/?version=latest "Documentation Status")](http://esp-idf.readthedocs.io/en/latest/?badge=latest)

-ESP-IDF is the official development framework for the `ESP32 <https://espressif.com/en/products/hardware/esp32/overview>`_ chip.
+ESP-IDF is the official development framework for the [ESP32](https://espressif.com/en/products/hardware/esp32/overview>) chip.

 # Developing With the ESP-IDF