Fix packages preparation for pinned versions

Pinned folder under `packages` wasn't properly filled out.

Also, pinned version for `css6` package needed a patch bump since a new version
was released earlier today.

Author: tidoust

packages/css6/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@webref/css",
   "description": "CSS definitions of the web platform",
-  "version": "6.23.0",
+  "version": "6.23.1",
   "repository": {
     "type": "git",
     "url": "https://github.com/w3c/webref.git"

tools/prepare-packages.js

@@ -61,7 +61,7 @@ async function preparePackages(curatedFolder, packagesFolder) {
     if (folder) {
       // Only keep extracts from specs in good standing targeted at browsers
       const specs = crawlIndex.results
-        .filter(spec => spec[name])
+        .filter(spec => spec[folder])
         .filter(spec => spec.categories?.includes('browser') && spec.standing === 'good');
       console.log(`- ${specs.length}/${crawlIndex.results.length} specs to include in the package`);
 
@@ -70,7 +70,7 @@ async function preparePackages(curatedFolder, packagesFolder) {
       const srcFiles = await fs.readdir(srcDir);
       for (const file of srcFiles) {
         if (file.endsWith(`.${fileExt}`) &&
-            specs.find(spec => spec[name] === `${name}/${file}`)) {
+            specs.find(spec => spec[folder] === `${folder}/${file}`)) {
           await fs.copyFile(path.join(srcDir, file), path.join(dstDir, file));
         }
       }