Backport "Fix newsletter html containing style tag content" to 0.23-stable

[ivan-mr]

🎩 What? Why?

Backport to 0.23-stable release of fix newsletter html containing style tag content

📌 Related Issues

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• Related to Fix newsletter html containing style tag content #6876

Testing

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📋 Checklist

🚨 Please review the guidelines for contributing to this repository.

• ❓ CONSIDER adding a unit test if your PR resolves an issue.
• ✔️ DO check open PR's to avoid duplicates.
• ✔️ DO keep pull requests small so they can be easily reviewed.
• ✔️ DO build locally before pushing.
• ✔️ DO make sure tests pass.
• ✔️ DO make sure any new changes are documented in docs/.
• ✔️ DO add and modify seeds if necessary.
• ✔️ DO add CHANGELOG upgrade notes if required.
• ✔️ DO add to GraphQL API if there are new public fields.
• ✔️ DO add link to MetaDecidim if it's a new feature.
• ❌AVOID breaking the continuous integration build.
• ❌AVOID making significant changes to the overall architecture.

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♥️ Thank you!

[tramuntanal]

Re-running 15 jobs that got stuck