fix: only show fetch warning if on old compatibility_date

Now that we have the `allow_custom_ports` compatibility flag, we only need to show the fetch warnings when that flag is not enabled.

Fixes cloudflare/workerd#2955

packages/wrangler/src/deployment-bundle/bundle.ts

@@ -576,7 +576,7 @@ export function shouldCheckFetch(
 	compatibilityDate: string = "2000-01-01", // Default to some arbitrary old date
 	compatibilityFlags: string[] = []
 ): boolean {
-	// Yes, the logic can be less verbose than this but doing it this way makes is very clear.
+	// Yes, the logic can be less verbose than this but doing it this way makes it very clear.
 	if (compatibilityFlags.includes("ignore_custom_ports")) {
 		return true;
 	}