fix indent issue in nextjs docs

Author: xieyuschen

src/content/docs/workers/framework-guides/web-apps/nextjs.mdx

@@ -165,8 +165,10 @@ You can convert an existing Next.js application to run on Cloudflare
     <Details header="Usage">
     	- `preview`: Builds your app and serves it locally, allowing you to
     	quickly preview your app running locally in the Workers runtime, via a
-    	single command. - `deploy`: Builds your app, and then deploys it to
-    	Cloudflare - `cf-typegen`: Generates a `cloudflare-env.d.ts` file at the
+    	single command. 
+			- `deploy`: Builds your app, and then deploys it to
+    	Cloudflare 
+			- `cf-typegen`: Generates a `cloudflare-env.d.ts` file at the
     	root of your project containing the types for the env.
     </Details>