fix: requirements-dev.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-SETUPTOOLS-9964606

Author: snyk-bot

requirements-dev.txt

@@ -7,7 +7,7 @@ isort
 mypy
 pytest
 pytest-cov
-setuptools>=70.0.0 # not directly required, pinned by Snyk to avoid a vulnerability
+setuptools>=78.1.1 # not directly required, pinned by Snyk to avoid a vulnerability
 sphinx
 twine<3.4
 urllib3>=2.2.2 # not directly required, pinned by Snyk to avoid a vulnerability