stylelint-lsp: fix script launch issue on macOS

A leading space before the shebang doesn't affect script execution when run from the shell or via exec on Linux.
However, on macOS, it results in an ENOEXEC (File format error) when using exec.
This fix removes the space to ensure stylelint-lsp can be launched from nixvim on macOS without errors.

Thanks to @gepbird for suggesting the proper fix.

pkgs/by-name/st/stylelint-lsp/package.nix

@@ -1,5 +1,4 @@
 {
-  bash,
   fetchFromGitHub,
   lib,
   nodejs,
@@ -18,8 +17,11 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     hash = "sha256-mzhY6MKkXb1jFYZvs/VkGipBjBfUY3GukICb9qVQI80=";
   };
 
-  nativeBuildInputs = [
+  buildInputs = [
     nodejs
+  ];
+
+  nativeBuildInputs = [
     pnpm_9.configHook
   ];
 
@@ -41,11 +43,8 @@ stdenvNoCC.mkDerivation (finalAttrs: {
 
     mkdir -p $out/{bin,lib/${finalAttrs.pname}}
     mv {dist,node_modules} $out/lib/${finalAttrs.pname}
-    echo "
-      #!${lib.getExe bash}
-      ${lib.getExe nodejs} $out/lib/${finalAttrs.pname}/dist/index.js \$@
-    " > $out/bin/stylelint-lsp
-    chmod +x $out/bin/stylelint-lsp
+    chmod a+x $out/lib/${finalAttrs.pname}/dist/index.js
+    ln -s $out/lib/${finalAttrs.pname}/dist/index.js $out/bin/stylelint-lsp
 
     runHook postInstall
   '';