docs: change tailwind.config.cjs darkMode class to selector

Author: shinokada

src/routes/docs/pages/introduction.md

@@ -74,7 +74,7 @@ const config = {
 
   plugins: [require('flowbite/plugin')],
 
-  darkMode: 'class',
+  darkMode: 'selector',
 
   theme: {
     extend: {

src/routes/docs/pages/quickstart.md

@@ -73,7 +73,7 @@ const config = {
 
   plugins: [require('flowbite/plugin')],
 
-  darkMode: 'class',
+  darkMode: 'selector',
 
   theme: {
     extend: {

tailwind.config.cjs

@@ -1,7 +1,7 @@
 const config = {
   content: ['./src/**/*.{html,js,svelte,ts,md}', './node_modules/flowbite-svelte/**/*.{html,js,svelte,ts}'],
   plugins: [require('flowbite/plugin')],
-  darkMode: 'class',
+  darkMode: 'selector',
   theme: {
     extend: {
       colors: {