Build error on PPA: MSRV check failed (rustc 1.85 < 1.88)

[appleparan]

Although issue #110 is resolved, a new build failure has emerged due to a Rust toolchain version mismatch. The build environment provides rustc 1.85.1, but updated dependencies require rustc 1.88+.

error: rustc 1.85.1 is not supported by the following packages:
  libloading@0.9.0 requires rustc 1.88.0
  sysinfo@0.37.2 requires rustc 1.88
Either upgrade rustc or select compatible dependency versions with
`cargo update <name>@<current-ver> --precise <compatible-ver>`
where `<compatible-ver>` is the latest version supporting rustc 1.85.1