Bump wagtail-factories from 4.2.1 to 4.4.0 in /backend (#4637)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

backend/pyproject.toml

@@ -91,7 +91,7 @@ dependencies = [
     "pyclamd>=0.4.0",
     "magika==0.6.2",
     "tzdata>=2024.1",
-    "wagtail-factories==4.2.1",
+    "wagtail-factories==4.4.0",
     "google-auth-oauthlib>=1.2.1",
     "PyJWT>=2.8.0",
     "cryptography>=46.0.7",
@@ -130,7 +130,7 @@ dev = [
     "pytest-cache<2.0,>=1.0",
     "time-machine<3.0.0,>=2.13.0",
     "libcst<2.0.0,>=1.1.0",
-    "wagtail-factories<5.0.0,>=4.1.0",
+    "wagtail-factories>=4.4.0,<5.0.0",
     "pytest-xdist>=3.5.0",
     "websockets>=12.0",
     "typer>=0.12.3",