chore(deps): bump djangosaml2 from 1.11.1 to 1.12.0 (#14339)

Bumps [djangosaml2](https://github.com/IdentityPython/djangosaml2) from 1.11.1 to 1.12.0.
- [Release notes](https://github.com/IdentityPython/djangosaml2/releases)
- [Changelog](https://github.com/IdentityPython/djangosaml2/blob/master/CHANGES)
- [Commits](IdentityPython/djangosaml2@v1.11.1...v1.12.0)

---
updated-dependencies:
- dependency-name: djangosaml2
  dependency-version: 1.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -57,7 +57,7 @@ PyJWT==2.11.0
 cvss==3.6
 django-fieldsignals==0.8.0
 hyperlink==21.0.0
-djangosaml2==1.11.1
+djangosaml2==1.12.0
 drf-spectacular==0.29.0
 drf-spectacular-sidecar==2026.1.1
 django-ratelimit==4.1.0