The cmd line msg incorrect when using ipv6 to create a playground cluster

[Defined2014]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. What did you do?

tiup playground nightly --db 1 --kv 1 --tiflash 0 --without-monitor --host 240e:390:98f:c940:2d8:61ff:fe14:d38f

2. What did you expect to see?

Connect TiDB:   mysql --host 240e:390:98f:c940:2d8:61ff:fe14:d38f --port 4000 -u root

3. What did you see instead?

Connect TiDB:   mysql --host [240e --port 390 -u root

4. What version of TiUP are you using (tiup --version)?

➜  tidb git:(master) ✗ tiup playground --version
tiup is checking updates for component playground ...
Starting component `playground`: /home/jasonmo/.tiup/components/playground/v1.12.1/tiup-playground --version
tiup version 1.12.1 tiup
Go Version: go1.19.8
Git Ref: v1.12.1
GitHash: f4dae709fa3e904958f3433b617a6bc4bd9049a3