Update README.md

packages/plugin-legacy/README.md

@@ -91,7 +91,7 @@ npm add -D terser
 
   If `modernTargets` is not set, it is **not recommended** to use the `true` value (which uses auto-detection) because `core-js@3` is very aggressive in polyfill inclusions due to all the bleeding edge features it supports. Even when targeting native ESM support, it injects 15kb of polyfills!
 
-  If you don't have hard reliance on bleeding edge runtime features, it is not that hard to avoid having to use polyfills in the modern build altogether. Alternatively, consider setting `modernTargets` or using an on-demand service like [cdnjs's polyfill service](https://cdnjs.cloudflare.com/polyfill/) to only inject necessary polyfills based on actual browser user-agents (most modern browsers will need nothing!).
+  If you don't have hard reliance on bleeding edge runtime features, it is not that hard to avoid having to use polyfills in the modern build altogether. Alternatively, consider setting `modernTargets` or using an on-demand service like https://cdnjs.cloudflare.com/polyfill/ to only inject necessary polyfills based on actual browser user-agents (most modern browsers will need nothing!).
 
 ### `renderLegacyChunks`