icons and symbols not redering on cli as expected to be done by the test-fonts.sh script
### Requirements

- [X] I have searched the [issues](https://github.com/ryanoasis/nerd-fonts/issues) for my issue and found nothing related or helpful
- [X] I have searched the [FAQ](https://github.com/ryanoasis/nerd-fonts/wiki/FAQ-and-Troubleshooting) for help
- [X] I have checked the [Wiki](https://github.com/ryanoasis/nerd-fonts/wiki) for help

### Experienced Behavior

i see all unicode characters being printed instead of icons

### Expected Behavior

i wanted the script to prints the icons and sysmbols but it does not as shown in screen shot
printf '\uF013 \uF120 \uF121 \uF126' ...Works perfectly..shows symbols
echo "\uF013 \uF120 \uF121 \uF126" ...Works perfectly..shows symbols

### Example Symbols or Text

_No response_

### Font Used

Fira-code-nerd-font

### Source of Font File

_No response_

### Terminal Emulator (and the title of the terminal window)

iterm

### Operating System and Version

macos sequoia 15.1 with bash, zsh and fish (tested on all)

### Screenshots

<img width="1536" alt="test-fonts" src="https://github.com/user-attachments/assets/d9656bf9-00b3-4aa0-b664-089b6cb09bd1">
