Fix broken link in README

README.md

@@ -20,7 +20,7 @@
 - **WARNING**: We may drop pagy's less used CSS extras. If you wish to keep them alive, please, [vote here](https://github.com/ddnexus/pagy/discussions/categories/survey)
 - Better frontend helpers
 - New [Pagy Playground](https://ddnexus.github.io/pagy/playground/) to showcase, clone and develop pagy APPs without any setup on 
-  your side (try the [pagy demo](https://ddnexus.github.io/pagy/playground.md#3-demo-app))
+  your side (try the [pagy demo](https://ddnexus.github.io/pagy/playground/#3-demo-app))
 - See the [Changelog](https://ddnexus.github.io/pagy/changelog) for possible breaking changes
 
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