fix(cli): replace shell-based update with native Rust implementation (#7148)

Signed-off-by: JF <john.franklin@gmail.com>
Co-authored-by: JF <john.franklin@gmail.com>
Co-authored-by: Jack Amadeo <jackamadeo@squareup.com>

crates/goose-cli/src/cli.rs

@@ -1518,7 +1518,7 @@ pub async fn cli() -> anyhow::Result<()> {
             canary,
             reconfigure,
         }) => {
-            crate::commands::update::update(canary, reconfigure)?;
+            crate::commands::update::update(canary, reconfigure).await?;
             Ok(())
         }
         Some(Command::Recipe { command }) => handle_recipe_subcommand(command),