Update README.md with Pages-Action Deprecation Message

README.md

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+> [!IMPORTANT]  
+> `pages-action` has been deprecated with the latest release being `v1.5.0`. We encourage you to migrate to [`wrangler-action`](https://github.com/cloudflare/wrangler-action), which supports Pages deployments and offers a unified tool for managing both Workers and Pages.
+> Here are a few important things to keep in mind as you make the migration:
+> - The YAML syntax for `wrangler-action` is different from `pages-action`. Please refer to the [Pages deployment setup instructions](https://github.com/cloudflare/wrangler-action?tab=readme-ov-file#deploy-your-pages-site-production--preview) for details.
+> - `wrangler-action` currently does not provide the same outputs as `pages-action` for Pages project deployments. If your workflows depend on these outputs, you may need to make temporary adjustments. Rest assured, we’re working to bring these outputs to `wrangler-action` soon. You can track our progress in this [issue](https://github.com/cloudflare/wrangler-action/issues/300).
+> - The "Deployment" feature available in `pages-action`, which lets you view a list of past deployments, is not yet available in `wrangler-action`, but we plan to add this in a future release of `wrangler-action`. You can track our progress in this [issue](https://github.com/cloudflare/wrangler-action/issues/301).
+>
+> We sincerely thank you for your support and contributions to `pages-action` over the years. The repository will remain open and archived. If you have any questions or issues please reach out to us on the [Cloudflare Developers Discord](https://discord.com/invite/cloudflaredev).
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 # Cloudflare Pages GitHub Action
 
 GitHub Action for creating Cloudflare Pages deployments, using the new [Direct Upload](https://developers.cloudflare.com/pages/platform/direct-upload/) feature and [Wrangler](https://developers.cloudflare.com/pages/platform/direct-upload/#wrangler-cli) integration.