MAINT: update docs/release.rst for PyPi.org
MAINT: update docs/release.rst for PyPi.org

rc/scikit-umfpack,rc/scikit-umfpack-rc,rc/scikit-umfpack,scikit-umfpack/scikit-umfpack,scikit-umfpack/scikit-umfpack,rc/scikit-umfpack-rc