fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-SETUPTOOLS-7448482

requirements.txt

@@ -3,4 +3,4 @@ twine
 certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability
 pygments>=2.15.0 # not directly required, pinned by Snyk to avoid a vulnerability
 requests>=2.31.0 # not directly required, pinned by Snyk to avoid a vulnerability
-setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability
+setuptools>=70.0.0 # not directly required, pinned by Snyk to avoid a vulnerability