Initiatives: Convert "Objectives" to "Community Initiatives"
This commit follows in-person discussion by the Fedora Council in our
2023 Council hackfest in Frankfurt, Germany. We agreed to convert
"Objectives" into "Community Initiatives", which we agreed was easier to
understand and communicate the roles of these efforts in the project.
There is no functional change to Objectives. It is just a cosmetic
change, and we will follow this change with more communications about
the transition to bring more excitement into Initiatives.
Signed-off-by: Justin W. Flory (he/him) <jwf@redhat.com>