fix: resolve tmp_dir unbound variable error in install script (#242) (#243)

* fix: resolve tmp_dir unbound variable error in install script (#242)

Expand $tmp_dir at trap-definition time so the EXIT trap does not
reference a local variable after the function returns under set -u.

* bump version

install.sh

@@ -247,7 +247,7 @@ resolve_release_version() {
 install_downloaded_release() {
   local tmp_dir binary_file checksum_file
   tmp_dir=$(mktemp -d "${TMPDIR:-/tmp}/grok-install.XXXXXX")
-  trap 'rm -rf "$tmp_dir"' EXIT
+  trap "rm -rf \"$tmp_dir\"" EXIT
 
   binary_file="${tmp_dir}/${ASSET_NAME}"
   checksum_file="${tmp_dir}/checksums.txt"

package.json

@@ -1,6 +1,6 @@
 {
   "name": "grok-dev",
-  "version": "1.1.4-rc4",
+  "version": "1.1.4-rc5",
   "description": "An open-source AI coding agent powered by Grok, built with Bun and OpenTUI.",
   "type": "module",
   "main": "dist/index.js",