Fix broken link to standalone builds (#1911)

Author: dhowden

src/pages/docs/v4-beta.mdx

@@ -357,7 +357,7 @@ Then compile your CSS using the CLI tool:
 $ npx @tailwindcss/cli -i input.css -o output.css
 ```
 
-You can also download [standalone builds](https://github.com/tailwindlabs/tailwindcss/releases/tag/v4.0.0-beta-1) of the new CLI tool from GitHub for projects that don't otherwise depend on the Node.js ecosystem.
+You can also download [standalone builds](https://github.com/tailwindlabs/tailwindcss/releases/tag/v4.0.0-beta.1) of the new CLI tool from GitHub for projects that don't otherwise depend on the Node.js ecosystem.
 
 ### Upgrading from v3