Bump wagtail from 4.2.2 to 5.0.5

Bumps [wagtail](https://github.com/wagtail/wagtail) from 4.2.2 to 5.0.5.
- [Release notes](https://github.com/wagtail/wagtail/releases)
- [Changelog](https://github.com/wagtail/wagtail/blob/main/CHANGELOG.txt)
- [Commits](wagtail/wagtail@v4.2.2...v5.0.5)

---
updated-dependencies:
- dependency-name: wagtail
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -57,7 +57,7 @@ tablib==3.5.0
 tomd==0.1.3
 wagtail-cache==2.2.0
 wagtail-purge==0.2
-wagtail==4.2.2
+wagtail==5.0.5
 whitenoise==5.3.0
 xhtml2pdf==0.2.11
 xmltodict==0.13.0