docs: use string status names in remaining numeric-only examples

Convert numeric status codes to string status names in files that
don't already have educational comments showing both options:
- docs/tutorial/patterns/macro/index.md
- docs/tutorial/getting-started/validation/index.md

Files with '// or status(...)' comments are left unchanged since
those comments help users learn both options are valid.

This is a stylistic preference - both forms work identically.
String names are more readable and self-documenting.

Author: braden-w

docs/tutorial/getting-started/validation/index.md

@@ -134,7 +134,7 @@ new Elysia()
 	.get('/', ({ status, set }) => {
 		set.headers['x-powered-by'] = 'Elysia'
 
-		return status(418, 'Hello Elysia!')
+		return status("I'm a teapot", 'Hello Elysia!')
 	})
 	.get('/docs', ({ redirect }) => redirect('https://elysiajs.com'))
 	.listen(3000)

docs/tutorial/patterns/macro/index.md

@@ -112,7 +112,7 @@ new Elysia()
     .macro('isFibonacci', {
 		body: t.Number(),
         beforeHandle({ body, status }) {
-            if(!isFibonacci(body)) return status(418)
+            if(!isFibonacci(body)) return status("I'm a teapot")
         }
     })
 	.post('/', ({ body }) => body, {