Hot-fix jinja2 requirement for older nbsphinx packages

[jakirkham]

Per issue ( spatialaudio/nbsphinx#563 ), jinja2 version 3.0.0+ breaks nbsphinx. Recently this constraint was added to nbsphinx packages here via PR ( #35 ). However older nbsphinx packages don't have this constraint so Conda could choose one of them in an attempt to get a newer jinja2 package. To fix this, it would be good to apply this version constraint to older nbsphinx packages via repodata hot-fixing. As an example of this please see PR ( conda-forge/conda-forge-repodata-patches-feedstock#142 ) or other similar PRs on that repo

[kmuehlbauer]

@jakirkham Thanks for the heads-up. As per spatialaudio/nbsphinx#573 the issue seems to be fixed with nbsphinx v0.8.6. I'll take care of removing the pin for 0.8.6 now. For the repodata-patch this will have to wait a bit untiI find the time to get me informed about that.