I saw this trace when building my system configuration this morning:
```
lazy-options.json> trace: warning: literalExample is deprecated, use literalExpression instead, or use literalMD for a non-Nix description.
```
This warning was introduced in https://github.com/NixOS/nixpkgs/pull/237557.
The option this commit changes was introduced in https://github.com/NixOS/nixpkgs/pull/137003.