Update functions.mdx

Changes indentation characters in example file tree to correct alignment in rendered docs.

web/docs/guides/functions.mdx

@@ -272,9 +272,9 @@ We recommend developing “fat functions”. This means that you should develop
     │   |   ├── supabaseAdmin.ts # Supabase client with SERVICE_ROLE key
     │ 	│   └── supabaseClient.ts # Supabase client with ANON key
     │ 	├── function-one # use hyphens to name functions
-    │ 	│ 	└── index.ts
+    │ 	│   └── index.ts
     │ 	└── function-two
-    │ 			└── index.ts
+    │       └── index.ts
     ├── migrations
     └── config.toml
 ```