chore(volo-build): fix clippy warning unnecessary_map_or

[yukiiiteru]

Motivation

Fix clippy warning unnecessary_map_or

error: this `map_or` is redundant
   --> volo-build/src/util.rs:313:16
    |
313 |             if repo.workdir().map_or(false, |workdir| workdir == path) {
    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use a standard comparison instead: `(repo.workdir() == Some(path))`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_map_or
    = note: `-D clippy::unnecessary-map-or` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::unnecessary_map_or)]`

Solution

Fix it