fix: scripts/audits/requirements.txt to reduce vulnerabilities

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

scripts/audits/requirements.txt

@@ -9,3 +9,4 @@ networkx>=2.6 # not directly required, pinned by Snyk to avoid a vulnerability
 sympy>=1.12 # not directly required, pinned by Snyk to avoid a vulnerability
 urllib3>=1.26.18 # not directly required, pinned by Snyk to avoid a vulnerability
 idna>=3.7 # not directly required, pinned by Snyk to avoid a vulnerability
+requests>=2.32.0 # not directly required, pinned by Snyk to avoid a vulnerability