Replace jrevels with JuliaLabs

[hyrodium]

Currently, the documentation deployment is failing.
This PR fixes the problem.

┌ Info: Deployment criteria for deploying preview build from GitHub Actions:
│ - ✘ ENV["GITHUB_REPOSITORY"]="JuliaLabs/Cassette.jl" occurs in repo="github.com/jrevels/Cassette.jl"
│ - ✔ ENV["GITHUB_REF"] corresponds to a PR number
│ - ✔ PR originates from the same repository
│ - ✔ `push_preview` keyword argument to deploydocs is `true`
│ - ✔ ENV["GITHUB_ACTOR"] exists and is non-empty
│ - ✔ ENV["DOCUMENTER_KEY"] exists and is non-empty
└ Deploying: ✘

https://github.com/JuliaLabs/Cassette.jl/runs/6362744974?check_suite_focus=true

[aviatesk]

Thanks!