cli: fix install on windows arm64 not working

Fixes microsoft#164573

Author: connor4312

cli/src/update_service.rs

@@ -300,6 +300,8 @@ impl Platform {
 			Some(Platform::WindowsX64)
 		} else if cfg!(all(target_os = "windows", target_arch = "x86")) {
 			Some(Platform::WindowsX86)
+		} else if cfg!(all(target_os = "windows", target_arch = "aarch64")) {
+			Some(Platform::WindowsARM64)
 		} else {
 			None
 		}

cli/src/util/prereqs.rs

@@ -39,7 +39,7 @@ impl PreReqChecker {
 	#[cfg(not(target_os = "linux"))]
 	pub async fn verify(&self) -> Result<Platform, AnyError> {
 		Platform::env_default().ok_or_else(|| {
-			SetupError("VS Code it not supported on this platform".to_owned()).into()
+			SetupError("VS Code is not supported on this platform".to_owned()).into()
 		})
 	}