chore(deps): update dependency django-tinymce to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
django-tinymce (changelog)	==3.7.1 -> ==4.1.0

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Release Notes

jazzband/django-tinymce (django-tinymce)

v4.1.0

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What's Changed

• Remove plugin "code" mentioned twice by @​dhruvkb in https://github.com/jazzband/django-tinymce/pull/467
• Refs #​470 - Replaced toolbar elements renamed in TinyMCE 6 by @​claudep in https://github.com/jazzband/django-tinymce/pull/471
• Refs #​470 - Removed buttons from premium plugins in the docs. by @​claudep in https://github.com/jazzband/django-tinymce/pull/472
• [pre-commit.ci] pre-commit autoupdate by @​pre-commit-ci in https://github.com/jazzband/django-tinymce/pull/458

New Contributors

• @​dhruvkb made their first contribution in https://github.com/jazzband/django-tinymce/pull/467

Full Changelog: jazzband/django-tinymce@4.0.0...4.1.0

v4.0.0

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• Upgrade embedded TinyMCE from 5.10.7 to 6.8.3

The spellchecker plugin is gone (including USE_SPELLCHECKER setting). Use
the browser_spellcheck TinyMCE option (activated by default) to enable
browser-based spellchecking.

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[PiotrIw]

Adds added in tinyMCE - older version less annoying