Fixing release_notes

Author: cvvergara

doc/src/release_notes.rst

@@ -51,7 +51,7 @@ To see the full list of changes check the list of `Git commits <https://github.c
 pgRouting 2.6.3 Release Notes
 -------------------------------------------------------------------------------
 
-To see the issues closed by this release see the `Git closed milestone for 2.6.2 <https://github.com/pgRouting/pgrouting/issues?utf8=%E2%9C%93&q=milestone%3A%22Release%202.6.3%22%20>`_ on Github.
+To see the issues closed by this release see the `Git closed milestone for 2.6.3 <https://github.com/pgRouting/pgrouting/issues?utf8=%E2%9C%93&q=milestone%3A%22Release%202.6.3%22%20>`_ on Github.
 
 .. rubric:: Bug fixes