perf(v2): convert synchronous filewrite to asynchronous in feed file …

…generate

This looks like should return a Promise list , other than a sync io operation

packages/docusaurus-plugin-content-blog/src/index.ts

@@ -448,11 +448,9 @@ export default function pluginContentBlog(
             `${feedType}.xml`,
           );
           const feedContent = feedType === 'rss' ? feed.rss2() : feed.atom1();
-          try {
-            fs.writeFileSync(feedPath, feedContent);
-          } catch (err) {
+          return fs.outputFile(feedPath, feedContent).catch((err) => {
             throw new Error(`Generating ${feedType} feed failed: ${err}`);
-          }
+          });
         }),
       );
     },