fix: use shell-compatible curl install (#3691)

docs/README.md

@@ -39,8 +39,9 @@ description: Starship is the minimal, blazing fast, and extremely customizable p
    With Shell:
 
    ```sh
-   sh -c "$(curl -fsSL https://starship.rs/install.sh)"
+   curl -sS https://starship.rs/install.sh | sh
    ```
+
    To update the Starship itself, rerun the above script. It will replace the current version without touching Starship's configuration.
 
    #### Install via Package Manager

docs/faq/README.md

@@ -53,7 +53,7 @@ The prompt will use as much context as is provided, but no flags are "required".
 If you get an error like "_version 'GLIBC_2.18' not found (required by starship)_" when using the prebuilt binary (for example, on CentOS 6 or 7), you can use a binary compiled with `musl` instead of `glibc`:
 
 ```sh
-sh -c "$(curl -fsSL https://starship.rs/install.sh)" -- --platform unknown-linux-musl
+curl -sS https://starship.rs/install.sh | sh -s -- --platform unknown-linux-musl
 ```
 
 ## Why do I see `Executing command "..." timed out.` warnings?

docs/installing/README.md

@@ -36,7 +36,7 @@ pkg install getconf
 ### Installation
 
 ```sh
-sh -c "$(curl -fsSL https://starship.rs/install.sh)" -- --bin-dir /data/data/com.termux/files/usr/bin
+curl -sS https://starship.rs/install.sh | sh -s -- --bin-dir /data/data/com.termux/files/usr/bin
 ```
 
 ## [Funtoo Linux](https://www.funtoo.org/Welcome)