[Snyk] Security upgrade wagtail from 2.13 to 6.3.6

[mck9]

Snyk has created this PR to fix 1 vulnerabilities in the pip dependencies of this project.

Snyk changed the following file(s):

• requirements/common.txt

⚠️ Warning

wagtailstreamforms 3.15 has requirement wagtail<2.14,>=2, but you have wagtail 5.0.5.
wagtail 5.0.5 has requirement django-modelcluster<7.0,>=6.0, but you have django-modelcluster 5.1.
wagtail 5.0.5 has requirement Willow<1.7,>=1.5, but you have Willow 1.4.
wagtail 5.0.5 has requirement openpyxl<4.0,>=3.0.10, but you have openpyxl 3.0.7.
wagtail 5.0.5 has requirement django-taggit<4.0,>=2.0, but you have django-taggit 1.4.0.
wagtail 5.0.5 has requirement Pillow<11.0.0,>=9.1.0, but you have Pillow 8.2.0.
wagtail-treemodeladmin 1.5.0 has requirement wagtail<3,>=2.11, but you have wagtail 5.0.5.

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Important

• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.
• Some vulnerabilities couldn't be fully fixed and so Snyk will still find them when the project is tested again. This may be because the vulnerability existed within more than one direct dependency, but not all of the affected dependencies could be upgraded.

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