chore: format code

packages/web/src/content/docs/custom-tools.mdx

@@ -45,6 +45,7 @@ export default {
   },
 }
 ```
+
 The filename becomes the tool name. This creates a `database` tool.
 
 ---
@@ -122,6 +123,3 @@ export default tool({
   },
 })
 ```
-
-
-