Bump djangorestframework from 3.15.2 to 3.17.1 in /backend (#4635)

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

Author: dependabot[bot]

backend/pyproject.toml

@@ -80,7 +80,7 @@ dependencies = [
     "google-auth<3.0.0,>=2.22.0",
     "argon2-cffi<24.0.0,>=23.1.0",
     "stripe==10.5.0",
-    "djangorestframework==3.15.2",
+    "djangorestframework==3.17.1",
     "l18n<2022.0,>=2021.3",
     "wagtail==7.2.3",
     "wagtail-localize==1.13",