Update dependency django-bleach to v1

This MR contains the following updates:

Package	Type	Update	Change
django-bleach	dependencies	major	^0.9.0 -> ^1.0.0

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Release Notes

marksweb/django-bleach

v1.0.0

Compare Source

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13-11-2021

Going to 1.0 is long overdue, especially considering SemVer.

• automated pypi releases via github actions
• pre-commit hooks
• python 3.10 support
• docs syntax highlighting #​38

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