Diffing OUTDATED comments with HEAD doesn't work in github.dev

[tamuseanmiller]

Looks like this is specific to GitHub.dev

• Extension version: v0.100.3
• VSCode Version: 1.95.3
• OS: N/A (Web version github.dev)
• Repository Clone Configuration (single repository/fork of an upstream repository): single repo
• Github Product (Github.com/Github Enterprise version x.x.x): Github.com org

Steps to Reproduce:

1. Open Github.dev for a pull request in an org
2. Login
3. Open the comments view
4. Try and diff an outdated comment with HEAD

Shows this:

Doubt this is an error here, I don't see any logs that are pertinent to this but just wanted some feedback as we would love to use this mechanism in github.dev.