Update _posts/2021-12-15-pulpcore-3.17-is-ga.md
Update _posts/2021-12-15-pulpcore-3.17-is-ga.md

Co-authored-by: Matthias Dellweg <a6a0845258a40575703021e5244ff9c70838a23b@gmx.de>
pulp/pulpproject.org,pulp/pulpproject.org,pulp/pulpproject.org,pulp/pulpproject.org