fix: server/requirements.txt to reduce vulnerabilities
fix: server/requirements.txt to reduce vulnerabilities


The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-LXML-1047473
- https://snyk.io/vuln/SNYK-PYTHON-LXML-1047474
BrianLusina/Arco,BrianLusina/Arco,BrianLusina/Arco,BrianLusina/Arco