DOC: from CONTRIBUTING.rst link to SciPy website (scipy#18910)

Co-authored-by: Pamphile Roy <[email protected]>

Author: TiloRC

CONTRIBUTING.rst

@@ -5,13 +5,13 @@ SciPy pull request guidelines
 Pull requests are always welcome, and the SciPy community appreciates
 any help you give. Note that a code of conduct applies to all spaces
 managed by the SciPy project, including issues and pull requests:
-https://github.com/scipy/scipy/blob/main/doc/source/dev/conduct/code_of_conduct.rst.
+https://docs.scipy.org/doc/scipy/dev/conduct/code_of_conduct.html
 
 When submitting a pull request, we ask you to check the following:
 
 1. **Unit tests**, **documentation**, and **code style** are in order.
    For details, please read
-   https://github.com/scipy/scipy/blob/main/doc/source/dev/hacking.rst.
+   https://docs.scipy.org/doc/scipy/dev/hacking.html
 
    It's also OK to submit work in progress if you're unsure of what
    this exactly means, in which case you'll likely be asked to make

doc/source/dev/hacking.rst

@@ -290,7 +290,7 @@ improvements, and submit your first PR!
 
 .. _virtualenvwrapper: https://bitbucket.org/dhellmann/virtualenvwrapper/
 
-.. _bsd pitch: http://nipy.sourceforge.net/nipy/stable/faq/johns_bsd_pitch.html
+.. _bsd pitch: https://web.archive.org/web/20130922065958/https://nipy.sourceforge.net/software/license/johns_bsd_pitch.html
 
 .. _Pytest: https://pytest.org/