Bump feedgen from 0.4.0 to 0.9.0 in /examples/feed
Bump feedgen from 0.4.0 to 0.9.0 in /examples/feed

Bumps [feedgen](https://github.com/lkiesow/python-feedgen) from 0.4.0 to 0.9.0.
- [Release notes](https://github.com/lkiesow/python-feedgen/releases)
- [Commits](https://github.com/lkiesow/python-feedgen/compare/v0.4.0...v0.9.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
piraz/firenado,piraz/firenado,candango/firenado,candango/firenado,candango/firenado,piraz/firenado