Update django-s3sign requirement from <=0.6.0 to <=0.6.1

Updates the requirements on [django-s3sign](https://github.com/ccnmtl/django-s3sign) to permit the latest version.
- [Release notes](https://github.com/ccnmtl/django-s3sign/releases)
- [Changelog](https://github.com/ccnmtl/django-s3sign/blob/master/CHANGES)
- [Commits](ccnmtl/django-s3sign@0.1.4...0.6.1)

---
updated-dependencies:
- dependency-name: django-s3sign
  dependency-version: 0.6.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -100,7 +100,7 @@ django-contact-us==1.1.0
 asgiref==3.11.0
 entrypoints==0.4
 aiocontextvars==0.2.2
-django-s3sign<=0.6.0
+django-s3sign<=0.6.1
 
 python-cas==1.7.1
 django-cas-ng==5.1.0