Integration README fixes (#3865)

* Remove stray XML tag in sitemap integration README

* Fix link errors

* Add changeset

Author: delucis

packages/integrations/netlify/README.md

@@ -56,9 +56,9 @@ export default defineConfig({
 ```
 ## Usage
 
-[Read the full deployment guide here.](https://docs.astro.build/en/guides/deploy/vercel)
+[Read the full deployment guide here.](https://docs.astro.build/en/guides/deploy/netlify/)
 
-After [performing a build](https://docs.astro.build/en/guides/deploy/#building-the-app) the `netlify/` folder will contain [Netlify Functions](https://docs.netlify.com/functions/overview/) in the `netlify/functions/` folder.
+After [performing a build](https://docs.astro.build/en/guides/deploy/#building-your-site-locally) the `netlify/` folder will contain [Netlify Functions](https://docs.netlify.com/functions/overview/) in the `netlify/functions/` folder.
 
 Now you can deploy. Install the [Netlify CLI](https://docs.netlify.com/cli/get-started/) and run: