Did you see her initial commit?[0] It's the default Rails app. Any tech-savvy person can throw that up on github in a day if they know nothing about it. The next time she changes the app/ directory, where all the actual Ruby code goes, is two months later.[1]
Absolutely nothing she's said has given the impression she is trying to mislead.
[0]: https://github.com/jendewalt/jennifer_dewalt/tree/258e91c40f...
[1]: https://github.com/jendewalt/jennifer_dewalt/commit/c0d02c8c...