Replace unmaintained directories-next crate with directories crate

[`directories-next`][1] crate is no longer maintained and
[`directories`][2] crate is still maintained. `directories-next`
had been forked from `directories` but it died because the original
`directories` crate revived the maintenance.

[1]: https://crates.io/crates/directories-next
[2]: https://crates.io/crates/directories

examples/todos/Cargo.toml

@@ -15,7 +15,7 @@ uuid = { version = "1.0", features = ["v4", "fast-rng", "serde"] }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 async-std.workspace = true
-directories-next = "2.0"
+directories = "6.0"
 tracing-subscriber = "0.3"
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]

examples/todos/src/main.rs

@@ -490,7 +490,7 @@ enum SaveError {
 impl SavedState {
     fn path() -> std::path::PathBuf {
         let mut path = if let Some(project_dirs) =
-            directories_next::ProjectDirs::from("rs", "Iced", "Todos")
+            directories::ProjectDirs::from("rs", "Iced", "Todos")
         {
             project_dirs.data_dir().into()
         } else {