Bump feedgen from 0.7.0 to 0.9.0
Bump feedgen from 0.7.0 to 0.9.0

Bumps [feedgen](https://github.com/lkiesow/python-feedgen) from 0.7.0 to 0.9.0.
- [Release notes](https://github.com/lkiesow/python-feedgen/releases)
- [Commits](https://github.com/lkiesow/python-feedgen/compare/v0.7.0...v0.9.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
NakamotoInstitute/nakamotoinstitute.org,NakamotoInstitute/nakamotoinstitute.org,NakamotoInstitute/nakamotoinstitute.org,NakamotoInstitute/nakamotoinstitute.org,NakamotoInstitute/nakamotoinstitute.org