Bump djangosaml2 from 1.8.0 to 1.9.0

Bumps [djangosaml2](https://github.com/IdentityPython/djangosaml2) from 1.8.0 to 1.9.0.
- [Release notes](https://github.com/IdentityPython/djangosaml2/releases)
- [Changelog](https://github.com/IdentityPython/djangosaml2/blob/master/CHANGES)
- [Commits](IdentityPython/djangosaml2@v1.8.0...v1.9.0)

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

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

requirements.txt

@@ -72,7 +72,7 @@ cvss==2.6
 django-fieldsignals==0.7.0
 hyperlink==21.0.0
 django-test-migrations==1.3.0
-djangosaml2==1.8.0
+djangosaml2==1.9.0
 drf-spectacular==0.27.0
 drf-spectacular-sidecar==2023.12.1
 django-ratelimit==4.1.0