Revert "test(size): increase verdaccio rate limit to 20K"

This reverts commit 053553a.

Author: AllanZhengYP

scripts/benchmark-size/runner/index.ts

@@ -100,7 +100,7 @@ export const sizeReport = async (options: SizeReportOptions) => {
         packageContext,
       }),
     })),
-    { concurrent: 10 }
+    { concurrent: 6 }
   );
   try {
     await tasks.run();

verdaccio/config.yaml

@@ -78,4 +78,4 @@ logs:
 
 userRateLimit:
   windowMS: 900000 # 15 minutes
-  max: 20000
+  max: 5000