Fix buttons in rte generated content

tailwind.config.js

@@ -4,6 +4,7 @@ const tinycolor = require('tinycolor2')
 module.exports = {
     purge: {
         content: [
+            './public/typo3conf/ext/ep_theme/Configuration/RTE/*.yaml',
             './public/typo3conf/ext/ep_theme/Configuration/TypoScript/**/*.typoscript',
             './public/typo3conf/ext/ep_theme/Resources/Private/Layouts/**/*.html',
             './public/typo3conf/ext/ep_theme/Resources/Private/Partials/**/*.html',