feat: added model Hermes "(Medium)" to models2.json

[activescott]

Describe your changes

added model Hermes "(Medium)" to models2.json

Sideloaded and tested on iMac 4.2 GHz Quad-Core Intel Core i7 w/ 64GB circa 2017.

Fixes #1272.

Issue ticket number and link

Checklist before requesting a review

• [x] I have performed a self-review of my code.
• [x] If it is a core feature, I have added thorough tests. – N/A
• [x] I have added thorough documentation for my code. – N/A
• [x] I have tagged PR with relevant project labels. I acknowledge that a PR without labels may be dismissed.
• [x] If this PR addresses a bug, I have provided both a screenshot/video of the original bug and the working solution. – N/A

Demo

https://github.com/nomic-ai/gpt4all/assets/213716/aecd9012-4268-4319-acc8-80f64619d583

Steps to Reproduce

You can see it in downloads and select it, and it will respond. BUT it must be sideloaded. Downloading it does not yet work.

Notes

I'm not sure yet how to make the link at https://gpt4all.io/models/gguf/... work. Please advise.