Fix minor typo in contributing.rst

Change-Id: I947142f5246660b01cf8b997922bac8cb74e61e0

docs/source/contributing.rst

diff --git a/docs/source/contributing.rst b/docs/source/contributing.rst
index 50f2b2a..20fe34d 100644
--- a/docs/source/contributing.rst
+++ b/docs/source/contributing.rst
@@ -19,7 +19,7 @@
 We follow Google's `C++ Style Guide
 <http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml>`_ and
 use `git <http://git-scm.com/>`_ for version control. We use the
-`Gerrit <https://ceres-solver.googlesource.com/>`_ to collaborate and
+`Gerrit <https://ceres-solver-review.googlesource.com/>`_ to collaborate and
 review changes to Ceres. Gerrit enables pre-commit reviews so that
 Ceres can maintain a linear history with clean, reviewed commits, and
 no merges.