Bump setuptools from 75.2.0 to 78.1.1

Bumps [setuptools](https://github.com/pypa/setuptools) from 75.2.0 to 78.1.1.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](https://github.com/pypa/setuptools/compare/v75.2.0...v78.1.1)

---
updated-dependencies:
- dependency-name: setuptools
  dependency-version: 78.1.1
  dependency-type: direct:production
...

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

requirements.txt

@@ -13,7 +13,7 @@ outline-vpn-api==6.3.0
 Redis==5.2.1
 whitenoise==6.9.0
 psycopg2-binary==2.9.10
-setuptools==75.2.0
+setuptools==78.1.1
 shortuuid==1.0.13
 cryptography==45.0.5
 acme>=2.0.0