[UI] Don't hard-code 'zzz' in active Lazy menu bar (next to lazy.nvim title)

[bluz71]

Did you check docs and existing issues?

• I have read all the lazy docs
• I have searched the existing issues of lazy
• I have searched the exsiting issues of the plugin I have a problem with

Neovim version (nvim -v)

NVIM v0.8.1

Operating system/version

Linux Mint 20.0

Describe the bug

The active title bar in the README looks like this:

Notice the sleepy zzz next to lazy.nvim.

However, this is what I see on my machine:

Looks like some type of Japanese Kanji. I assume this is happening for me since I deliberately don't use a NERD Font (by choice).

That character is hard-coded here.

Steps To Reproduce

1. Run Neovim on a machine without the 鈴 character.

Expected Behavior

I don't mind the current behaviour as default. But it would be desirable to configure that character in the Lazy configuration ui section for folks such as myself.

I think hard-coding zzz is not desirable for folks who run minimal terminal and font setups.

Best regards.

Repro

No response