fix(site): do not error on closed build logs stream (#16067)

Related: https://github.com/coder/coder/issues/15937

site/src/api/api.ts

@@ -280,6 +280,9 @@ export const watchBuildLogsByBuildId = (
 	);
 
 	socket.addEventListener("error", () => {
+		if (socket.readyState === socket.CLOSED) {
+			return;
+		}
 		onError?.(new Error("Connection for logs failed."));
 		socket.close();
 	});