fix: engines/nmap/requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-GEVENT-8320934
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-8309091
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-8309092

engines/nmap/requirements.txt

@@ -2,7 +2,7 @@ certifi==2022.12.7
 chardet==3.0.4
 click==8.1.3
 Flask==2.2.3
-gevent==22.10.2
+gevent==24.10.1
 greenlet==2.0.1
 gunicorn==20.1.0
 idna==2.7
@@ -14,4 +14,4 @@ psutil==5.9.4
 requests==2.28.2
 setuptools==65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability
 urllib3==1.26.14
-werkzeug==2.2.3
+werkzeug==3.0.6