Bump marshmallow from 3.26.1 to 4.0.0

Bumps [marshmallow](https://github.com/marshmallow-code/marshmallow) from 3.26.1 to 4.0.0.
- [Changelog](https://github.com/marshmallow-code/marshmallow/blob/dev/CHANGELOG.rst)
- [Commits](https://github.com/marshmallow-code/marshmallow/compare/3.26.1...4.0.0)

---
updated-dependencies:
- dependency-name: marshmallow
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

docs/all.md

@@ -1507,19 +1507,3 @@ Note: better to search on space 'notify-production' rather than specifically for
 #notify-admin-1505 (general login issues)
 #notify-admin-1701 (wrong sender phone number)
 #notify-admin-1859 (job is created with created_at being the wrong time)
-
-### refreshing the login.gov certificate
-
-1. generate certificate:   `openssl req -x509 -newkey rsa:2048 -keyout key.pem -out cert.crt -nodes`
-2. update the github secrets for staging, demo, production (contents of key.pem go in LOGIN_PEM and contents of cert.crt in LOGIN_PUB).
-DO NOT RESTAGE YET.
-3. use the same certificate for staging, demo, and production
-4. login to the login.gov partner app (https://portal.int.identitysandbox.gov)
-5. add the new certificate to the production version of Notify in the partner app (our partner app account has sandbox and production)
-6. Make a Zendesk support request for login.gov to push the new version of Notify (https://zendesk.login.gov)
-7. Do not delete the old certificate, because you need things to keep working until you complete the transition.
-8. When you receive an email from login.gov that the app has been pushed successfully, restage notify on the staging tier
-9. If staging works, you can restage demo and production
-10. Delete the old certificate in the partner app, send another zendesk request to push again.  This is best practice but a lower
-priority, because certificates eventually expire anyway and we have changed the certificate in github secrets, so the old cert is
-no longer relevant.

pyproject.toml

@@ -36,7 +36,7 @@ gunicorn = {version = "==23.0.0", extras = ["eventlet"]}
 iso8601 = "==2.1.0"
 jsonschema = {version = "==4.23.0", extras = ["format"]}
 lxml = "==5.3.1"
-marshmallow = "==3.26.1"
+marshmallow = "==4.0.0"
 marshmallow-sqlalchemy = "==1.0.0"
 newrelic = "*"
 notifications-python-client = "==10.0.0"