`ashpd` 0.11 is incompatible with recent zbus/zvariant releases, causing
a compilation error in Linux. Bumping to 0.12 fixes it.
See: https://github.com/bilelmoussaoui/ashpd/issues/323

To reproduce:

```toml
[package]
name = "test-gpui"
version = "0.1.0"
edition = "2021"

[dependencies]
gpui = { git = "https://github.com/zed-industries/zed" }
```

```bash
...
   Compiling ashpd v0.11.0
error[E0277]: the trait bound `AppID: Basic` is not satisfied
   --> /home/neulus/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/ashpd-0.11.0/src/documents/mod.rs:391:16
    |
391 |         self.0.call("Info", &(doc_id.into())).await
    |                ^^^^ unsatisfied trait bound
    |
help: the trait `Basic` is not implemented for `AppID`
   --> /home/neulus/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/ashpd-0.11.0/src/app_id.rs:10:1
    |
 10 | pub struct AppID(String);
    | ^^^^^^^^^^^^^^^^
    = help: the following other types implement trait `Basic`:
              &B
              BusName<'_>
              ErrorName<'_>
              InterfaceName<'_>
              MemberName<'_>
              NonZero<i16>
              NonZero<i32>
              NonZero<i64>
            and 35 others
    = note: required for `HashMap<AppID, Vec<Permission>>` to implement `zbus::zvariant::Type`
    = note: 1 redundant requirement hidden
    = note: required for `(file_path::FilePath, HashMap<AppID, Vec<Permission>>)` to implement `zbus::zvariant::Type`
note: required by a bound in `proxy::Proxy::<'a>::call`
   --> /home/neulus/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/ashpd-0.11.0/src/proxy.rs:172:40
    |
166 |     pub(crate) async fn call<R>(
    |                         ---- required by a bound in this associated function
...
172 |         R: for<'de> Deserialize<'de> + Type,
    |                                        ^^^^ required by this bound in `Proxy::<'a>::call`

error[E0277]: the trait bound `DocumentID: Basic` is not satisfied
   --> /home/neulus/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/ashpd-0.11.0/src/documents/mod.rs:500:16
    |
500 |         self.0.call_versioned("GetHostPaths", &(doc_ids,), 5).await
    |                ^^^^^^^^^^^^^^ unsatisfied trait bound
    |
help: the trait `Basic` is not implemented for `DocumentID`
   --> /home/neulus/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/ashpd-0.11.0/src/app_id.rs:98:1
    |
 98 | pub struct DocumentID(String);
    | ^^^^^^^^^^^^^^^^^^^^^
    = help: the following other types implement trait `Basic`:
              &B
              BusName<'_>
              ErrorName<'_>
              InterfaceName<'_>
              MemberName<'_>
              NonZero<i16>
              NonZero<i32>
              NonZero<i64>
            and 35 others
    = note: required for `HashMap<DocumentID, file_path::FilePath>` to implement `zbus::zvariant::Type`
note: required by a bound in `proxy::Proxy::<'a>::call_versioned`
   --> /home/neulus/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/ashpd-0.11.0/src/proxy.rs:195:40
    |
188 |     pub(crate) async fn call_versioned<R>(
    |                         -------------- required by a bound in this associated function
...
195 |         R: for<'de> Deserialize<'de> + Type,
    |                                        ^^^^ required by this bound in `Proxy::<'a>::call_versioned`

For more information about this error, try `rustc --explain E0277`.
error: could not compile `ashpd` (lib) due to 2 previous errors
```

Release Notes:

- N/A