Fix cargo-binstall installation failure

`head` doesn't accept `1` option.

CHANGELOG.md

@@ -10,6 +10,8 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+- Fix cargo-binstall installation failure.
+
 ## [1.8.0] - 2022-07-26
 
 - Only use musl binaries for nextest if glibc isn't available. See [#13](https://github.com/taiki-e/install-action/issues/13) for more.

main.sh

@@ -95,7 +95,7 @@ install_cargo_binstall() {
 
         download "${url}" "${cargo_bin}" "cargo-binstall${exe}"
         info "cargo-binstall installed at $(type -P "cargo-binstall${exe}")"
-        x cargo binstall | head 1 # cargo binstall doesn't have a normal --version flag
+        x cargo binstall | head -1 # cargo binstall doesn't have a normal --version flag
     else
         info "cargo-binstall already installed on in ${cargo_bin}/cargo-binstall"
     fi