fix: only show Tailwind v4 warning when v4 is used (#983) (#984)

Author: cjpearson

src/module.ts

@@ -50,7 +50,7 @@ export default defineNuxtModule<ModuleOptions>({
 
     const isTailwind4 = await readPackageJSON('tailwindcss', { parent: import.meta.url }).then(m => Number.parseFloat(m.version!) >= 4)
 
-    if (!moduleOptions.experimental?.tailwindcss4) {
+    if (isTailwind4 && !moduleOptions.experimental?.tailwindcss4) {
       logger.warn('Tailwind CSS v4 detected. The current version of `@nuxtjs/tailwindcss` supports Tailwind CSS 3 officially and support for v4 is experimental. To suppress this warning, set `tailwindcss.experimental.tailwindcss4` to  `true` in your `nuxt.config`.')
     }