fix: test-requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-ZIPP-7430899

test-requirements.txt

@@ -10,4 +10,5 @@ PyYAML
 numpy>=1.22.2 # not directly required, pinned by Snyk to avoid a vulnerability
 certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability
 idna>=3.7 # not directly required, pinned by Snyk to avoid a vulnerability
-requests>=2.31.0 # not directly required, pinned by Snyk to avoid a vulnerability
+requests>=2.31.0 # not directly required, pinned by Snyk to avoid a vulnerability
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability