Update terminology from "orphans" to "unlinked objects"

[Alexander-L-G]

• [x] I understand that contributing to this repository will require me to agree with the CLA

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Description

This PR updates some out-of-date terminology in the Graph section of the documentation to match the current version's modernized terminology. Specifically, the term "orphans" is updated to "unlinked objects". I have also included an updated screenshot of the menu options and have utilized a human-readable filename.

What type of PR is this? (check all applicable)

• [ ] 🍕 Feature
• [ ] 🐛 Bug Fix
• [x] 📝 Documentation Update
• [ ] 🎨 Style
• [ ] 🧑‍💻 Code Refactor
• [ ] 🔥 Performance Improvements
• [ ] ✅ Test
• [ ] 🤖 Build
• [ ] 🔁 CI

Related Tickets & Documents

NA

Mobile & Desktop Screenshots/Recordings

NA

Added tests?

• [ ] 👍 yes
• [x] 🙅 no, because they aren't needed
• [ ] 🙋 no, because I need help

Added to documentation?

• [ ] 📜 README.md
• [ ] 📓 tech-docs
• [x] 🙅 no documentation needed

Are there any post-deployment tasks we need to perform?

I don't think so since this is just a quick documentation tweak.