fix: etl/requirements-dev.txt to reduce vulnerabilities

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

etl/requirements-dev.txt

@@ -9,3 +9,4 @@ numpy>=1.22.2 # not directly required, pinned by Snyk to avoid a vulnerability
 setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability
 jupyter-server>=2.11.2 # not directly required, pinned by Snyk to avoid a vulnerability
 tornado>=6.3.3 # not directly required, pinned by Snyk to avoid a vulnerability
+requests>=2.32.0 # not directly required, pinned by Snyk to avoid a vulnerability