perf: speed up self-update by calling /releases/latest api instead of /releases (#4619)

Using `ReleaseList` ends up calling
`https://api.github.com/repos/jdx/mise/releases` but it was only being
used to get the latest version.

Now `Update` is reused which has a `get_latest_release` that calls
`https://api.github.com/repos/jdx/mise/releases/latest`.

As reference this are the sizes of the responses of each of the
endpoints

 - https://api.github.com/repos/jdx/mise/releases 2,4M
 - https://api.github.com/repos/jdx/mise/releases/latest 77k

This are the results before and after in my case:

before:
```
➤ time mise self-update
Checking target-arch... mise-v2025.3.2-linux-x64.tar.gz
Checking current version... v2025.3.2
Checking latest released version... mise is already up to date
mise plugin:dotnet   ✓ https://github.com/mise-plugins/mise-dotnet.git#162124c
________________________________________________________
Executed in    7.17 secs      fish           external
   usr time  146.07 millis    0.65 millis  145.42 millis
   sys time   82.81 millis    1.22 millis   81.58 millis
```

after:
```
➤ time mise self-update
Checking target-arch... mise-v2025.3.2-linux-x64.tar.gz
Checking current version... v2025.3.2
Checking latest released version... mise is already up to date
mise plugin:dotnet   ✓ https://github.com/mise-plugins/mise-dotnet.git#162124c
________________________________________________________
Executed in    1.96 secs      fish           external
   usr time   67.64 millis  891.00 micros   66.74 millis
   sys time   52.84 millis  939.00 micros   51.90 millis
```

It still takes longer than what I would expect, considering the time
`mise upgrade` takes:
```
➤ mise ls --current
Tool   Version  Source                      Requested
bun    1.2.5    ~/.config/mise/config.toml  latest
deno   2.2.3    ~/.config/mise/config.toml  latest
node   22.14.0  ~/.config/mise/config.toml  lts
usage  2.0.5    ~/.config/mise/config.toml  latest
➤ rm -r ~/.cache/mise/
➤ time mise upgrade
mise All tools are up to date

________________________________________________________
Executed in  171.74 millis    fish           external
   usr time   19.08 millis    0.00 micros   19.08 millis
   sys time   17.74 millis  737.00 micros   17.00 millis
```

Author: vemoo

src/cli/self_update.rs

@@ -1,8 +1,7 @@
 use color_eyre::Result;
 use color_eyre::eyre::bail;
 use console::style;
-use self_update::backends::github::{ReleaseList, Update};
-use self_update::update::Release;
+use self_update::backends::github::Update;
 use self_update::{Status, cargo_crate_version};
 
 use crate::cli::version::{ARCH, OS};
@@ -55,56 +54,42 @@ impl SelfUpdate {
         Ok(())
     }
 
-    fn fetch_releases(&self) -> Result<Vec<Release>> {
-        let mut releases = ReleaseList::configure();
+    fn do_update(&self) -> Result<Status> {
+        let mut update = Update::configure();
         if let Some(token) = &*env::GITHUB_TOKEN {
-            releases.auth_token(token);
+            update.auth_token(token);
         }
-        let releases = releases
+        #[cfg(windows)]
+        let bin_path_in_archive = "mise/bin/mise.exe";
+        #[cfg(not(windows))]
+        let bin_path_in_archive = "mise/bin/mise";
+        update
             .repo_owner("jdx")
             .repo_name("mise")
-            .build()?
-            .fetch()?;
-        Ok(releases)
-    }
-
-    fn latest_version(&self) -> Result<String> {
-        let releases = self.fetch_releases()?;
-        Ok(releases[0].version.clone())
-    }
+            .bin_name("mise")
+            .current_version(cargo_crate_version!())
+            .bin_path_in_archive(bin_path_in_archive);
 
-    fn do_update(&self) -> Result<Status> {
         let settings = Settings::try_get();
         let v = self
             .version
             .clone()
-            .map_or_else(|| self.latest_version(), Ok)
+            .map_or_else(
+                || -> Result<String> { Ok(update.build()?.get_latest_release()?.version) },
+                Ok,
+            )
             .map(|v| format!("v{}", v))?;
         let target = format!("{}-{}", *OS, *ARCH);
-        let mut update = Update::configure();
-        if let Some(token) = &*env::GITHUB_TOKEN {
-            update.auth_token(token);
-        }
         if self.force || self.version.is_some() {
             update.target_version_tag(&v);
         }
         #[cfg(windows)]
         let target = format!("mise-{v}-{target}.zip");
         #[cfg(not(windows))]
         let target = format!("mise-{v}-{target}.tar.gz");
-        #[cfg(windows)]
-        let bin_path_in_archive = "mise/bin/mise.exe";
-        #[cfg(not(windows))]
-        let bin_path_in_archive = "mise/bin/mise";
         let status = update
-            .repo_owner("jdx")
-            .repo_name("mise")
-            .bin_name("mise")
             .verifying_keys([*include_bytes!("../../zipsign.pub")])
             .show_download_progress(true)
-            .current_version(cargo_crate_version!())
-            .target(&target)
-            .bin_path_in_archive(bin_path_in_archive)
             .target(&target)
             .no_confirm(settings.is_ok_and(|s| s.yes) || self.yes)
             .build()?