cli: fix serve-web needs to wait a certain amount of time after machi…

…ne startup (microsoft#236427)

Fixes microsoft#233155

cli/src/commands/serve_web.rs

@@ -548,9 +548,11 @@ impl ConnectionManager {
 			Err(_) => Quality::Stable,
 		});
 
+		let now = Instant::now();
 		let latest_version = tokio::sync::Mutex::new(cache.get().first().map(|latest_commit| {
 			(
-				Instant::now() - Duration::from_secs(RELEASE_CHECK_INTERVAL),
+				now.checked_sub(Duration::from_secs(RELEASE_CHECK_INTERVAL))
+					.unwrap_or(now), // handle 0-ish instants, #233155
 				Release {
 					name: String::from("0.0.0"), // Version information not stored on cache
 					commit: latest_commit.clone(),