fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-H11-10293728
- https://snyk.io/vuln/SNYK-PYTHON-JUPYTERCORE-10300774
- https://snyk.io/vuln/SNYK-PYTHON-ZIPP-7430899

Author: snyk-bot

requirements.txt

@@ -48,3 +48,4 @@ wily>=1.24.2
 xmltodict>=0.13.0
 h11>=0.16.0 # not directly required, pinned by Snyk to avoid a vulnerability
 zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability
+jupyter-core>=5.8.0 # not directly required, pinned by Snyk to avoid a vulnerability