fix: error when using regex on get text block

src/content/blocks-handler/handler-get-text.js

@@ -14,7 +14,7 @@ function getText(block) {
     } = block.data;
 
     if (regexData) {
-      regex = new RegExp(regexData, regexExp.join(''));
+      regex = new RegExp(regexData, [...new Set(regexExp)].join(''));
     }
 
     handleSelector(block, {