Update build-pkg-unix.yml

Author: crazywhalecc

.github/workflows/build-pkg-unix.yml

@@ -40,6 +40,7 @@ jobs:
           macos-*)
             bin/setup-runtime
             export PATH="$(pwd)/bin:$PATH"
+            echo "$(pwd)/bin" >> $GITHUB_PATH
             composer install --no-dev
             bin/spc doctor --auto-fix
             echo "SPC_PREFIX=bin/spc" >> "$GITHUB_OUTPUT"