spacetimedb-update self-install fails if the install fails. (#2642)

Co-authored-by: Zeke Foppa <bfops@users.noreply.github.com>

Author: bfops

crates/update/src/cli/self_install.rs

@@ -67,12 +67,9 @@ impl SelfInstall {
             .context("could not install binary")?;
 
         eprintln!("Downloading latest version...");
-        let res = super::upgrade::Upgrade {}
+        super::upgrade::Upgrade {}
             .exec(&paths)
-            .context("failed to download and install latest SpacetimeDB version");
-        if let Err(err) = &res {
-            eprintln!("Error: {err:#}\n")
-        }
+            .context("failed to download and install latest SpacetimeDB version")?;
 
         eprintln!(
             "The `spacetime` command has been installed as {}",