chore(deps): update dependency wagtail to v5.2.6

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
wagtail (source, changelog)	==5.2.2 -> ==5.2.6

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Release Notes

wagtail/wagtail (wagtail)

v5.2.6: 5.2.6

Compare Source

• Fix: CVE-2024-39317: Regular expression denial-of-service via search query parsing (Jake Howard)
• Fix: Fix image preview when Willow optimizers are enabled (Alex Tomkins)
• Maintenance: Remove django-pattern-library upper bound in testing dependencies (Sage Abdullah)

v5.2.5: 5.2.5

Compare Source

• Fix: Respect WAGTAIL_ALLOW_UNICODE_SLUGS setting when auto-generating slugs (LB (Ben) Johnston)
• Fix: Use correct URL when redirecting back to page search results after an AJAX search (Sage Abdullah)
• Fix: Provide convert_mariadb_uuids management command to assist with upgrading to Django 5.0+ on MariaDB (Matt Westcott)

v5.2.4: 5.2.4

Compare Source

• Fix: Prevent TitleFieldPanel from raising an error when the slug field is missing or read-only (Rohit Sharma)
• Fix: Fix pagination links on model history and usage views (Matt Westcott)
• Fix: Fix crash when accessing workflow reports with a deleted snippet (Sage Abdullah)
• Fix: Prevent error on submitting an empty search in the admin under Elasticsearch (Maikel Martens)

v5.2.3: 5.2.3

Compare Source

• Fix: Prevent a ValueError with FormSubmissionsPanel on Django 5.0 when creating a new form page (Matt Westcott)
• Fix: Specify telepath 0.3.1 as the minimum supported version, for Django 5.0 compatibility (Matt Westcott)

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