fix: User Answers not exporting from surveys

[AyakorK]

🎩 Description

Please describe your pull request.

📌 Related Issues

Link your PR to an issue

• Error on Decidim::Forms::ExportQuestionnaireAnswersJob

Testing

Describe the best way to test or validate your PR.

• Initialize your app

TO SETUP YOUR APP

• Please use DOCKER you absolutely need it
• If you already had setup a docker instance of decidim-tou in the past please run make teardown
• Run the command make run to setup your app
• Once it's setup please make sure you access to your platform using the url https://localhost:3000

TEST THE FEATURE

• Log in as a user (or admin)
• Access to BackOffice
• Go to a Participatory Process
• Go to the Survey component settings
• Open it to the answers
• Access front office using your account or an other
• Answer it and submit it
• Go back to the BackOffice
• Access the answers (using edit button on the survey component)
• Export an answer or every answers
• Check on letter_opener if you have the export
• Check on Sidekiq if you have the error on an other one and please share it to us

Tasks

• Add specs
• Fix version of wicked_pdf to 2.6.3
• Enable import of wicked_pdf on config/application.rb
• Fix the CI

📷 Screenshots

Please add screenshots of the changes you're proposing if related to the UI