fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-REQUESTS-6928867

requirements.txt

@@ -2,5 +2,5 @@ build
 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
+requests>=2.32.0 # not directly required, pinned by Snyk to avoid a vulnerability
 setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability