shell: Correctly identifiy powershell shells on windows (#43526)

Release Notes:

- Fixed zed only finding pwsh but not powershell on windows

crates/gpui/src/platform/windows/platform.rs

@@ -389,11 +389,12 @@ impl Platform for WindowsPlatform {
         #[allow(
             clippy::disallowed_methods,
             reason = "We are restarting ourselves, using std command thus is fine"
-        )]
-        let restart_process = util::command::new_std_command("powershell.exe")
-            .arg("-command")
-            .arg(script)
-            .spawn();
+        )] // todo(shell): There might be no powershell on the system
+        let restart_process =
+            util::command::new_std_command(util::shell::get_windows_system_shell())
+                .arg("-command")
+                .arg(script)
+                .spawn();
 
         match restart_process {
             Ok(_) => self.quit(),