Update setuptools requirement from ~=75.5.0 to ~=75.6.0

Updates the requirements on [setuptools](https://github.com/pypa/setuptools) to permit the latest version.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](pypa/setuptools@v75.5.0...v75.6.0)

---
updated-dependencies:
- dependency-name: setuptools
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -4,4 +4,4 @@ Flask~=3.1.0
 bcrypt~=4.2.1
 flask-mysqldb~=2.0.0
 pytz~=2024.2
-setuptools~=75.5.0
+setuptools~=75.6.0