[docs] brackets must be quoted in zsh

Authored by: bashonly

README.md

@@ -169,7 +169,7 @@ Example usage:
 yt-dlp --update-to nightly
 
 # To install nightly with pip:
-python3 -m pip install -U --pre yt-dlp[default]
+python3 -m pip install -U --pre "yt-dlp[default]"
 ```
 
 ## DEPENDENCIES
@@ -201,7 +201,7 @@ While all the other dependencies are optional, `ffmpeg` and `ffprobe` are highly
 The following provide support for impersonating browser requests. This may be required for some sites that employ TLS fingerprinting. 
 
 * [**curl_cffi**](https://github.com/yifeikong/curl_cffi) (recommended) - Python binding for [curl-impersonate](https://github.com/lwthiker/curl-impersonate). Provides impersonation targets for Chrome, Edge and Safari. Licensed under [MIT](https://github.com/yifeikong/curl_cffi/blob/main/LICENSE)
-  * Can be installed with the `curl-cffi` group, e.g. `pip install yt-dlp[default,curl-cffi]`
+  * Can be installed with the `curl-cffi` group, e.g. `pip install "yt-dlp[default,curl-cffi]"`
   * Currently only included in `yt-dlp.exe` and `yt-dlp_macos` builds