build(deps-dev): bump wagtail from 6.3 to 6.3.1

Bumps [wagtail](https://github.com/wagtail/wagtail) from 6.3 to 6.3.1.
- [Release notes](https://github.com/wagtail/wagtail/releases)
- [Changelog](https://github.com/wagtail/wagtail/blob/main/CHANGELOG.txt)
- [Commits](wagtail/wagtail@v6.3...v6.3.1)

---
updated-dependencies:
- dependency-name: wagtail
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

poetry.lock

@@ -13,7 +13,7 @@ version = "4.2.0"
 Django = {extras = ["argon2"], version = "^5.1"}
 python = "^3.10"
 whitenoise = {extras = ["brotli"], version = "^6.8.2"}
-wagtail = "^6.2"
+wagtail = "^6.3"
 factory-boy = "^3.3.1"
 gunicorn = "^23.0.0"
 tba-api-v3client = "^3.8.0"