🐛 Fix legacy publicId format validation

apps/builder/src/helpers/toKebabCase.ts

@@ -1,7 +1,12 @@
+import { isNotEmpty } from '@typebot.io/lib'
+
 export const toKebabCase = (value: string) => {
   const matched = value.match(
     /[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g
   )
   if (!matched) return ''
-  return matched.map((x) => x.toLowerCase()).join('-')
+  return matched
+    .filter(isNotEmpty)
+    .map((x) => x.toLowerCase())
+    .join('-')
 }