Update README.rst [ci skip]

README.rst

@@ -6,7 +6,7 @@ Piexif
 | This is a renamed project from Pyxif.
 | To simplify exif manipulations with python. Writing, reading, and more...
 | Piexif isn't a wrapper. To everywhere with Python.
-| http://piexif.readthedocs.org/en/latest/
+| http://piexif.readthedocs.org/en/master/
 
 Install
 -------
@@ -142,4 +142,4 @@ This software is released under the MIT License, see LICENSE.txt.
 .. |Coverage Status| image:: https://coveralls.io/repos/hMatoba/Piexif/badge.svg?branch=master
    :target: https://coveralls.io/r/hMatoba/Piexif?branch=master
 .. |docs| image:: https://readthedocs.org/projects/piexif/badge/?version=latest
-   :target: https://readthedocs.org/projects/piexif/
+   :target: https://readthedocs.org/projects/piexif/