DOC: correction to contributing.rst

Author: jreback

CONTRIBUTING.md

@@ -12,8 +12,8 @@ navigate to the [GitHub "issues"
 tab](https://github.com/pydata/pandas/issues) and start looking through
 interesting issues. There are a number of issues listed under
 [Docs](https://github.com/pydata/pandas/issues?labels=Docs&sort=updated&state=open)
-and [Good as first
-PR](https://github.com/pydata/pandas/issues?labels=Good+as+first+PR&sort=updated&state=open)
+and [Difficulty
+Novice](https://github.com/pydata/pandas/issues?q=is%3Aopen+is%3Aissue+label%3A%22Difficulty+Novice%22)
 where you could start out.
 
 Or maybe through using *pandas* you have an idea of you own or are

doc/source/contributing.rst

@@ -17,8 +17,8 @@ If you are simply looking to start working with the *pandas* codebase, navigate
 `GitHub "issues" tab <https://github.com/pydata/pandas/issues>`_ and start looking through
 interesting issues.  There are a number of issues listed under `Docs
 <https://github.com/pydata/pandas/issues?labels=Docs&sort=updated&state=open>`_
-and `Good as first PR
-<https://github.com/pydata/pandas/issues?labels=Good+as+first+PR&sort=updated&state=open>`_
+and `Difficulty Novice
+<https://github.com/pydata/pandas/issues?q=is%3Aopen+is%3Aissue+label%3A%22Difficulty+Novice%22>`_
 where you could start out.
 
 Or maybe through using *pandas* you have an idea of you own or are looking for something