fix: files/requirements_dev.txt to reduce vulnerabilities

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

Author: snyk-bot

files/requirements_dev.txt

@@ -30,5 +30,5 @@ configobj>=5.0.6
 async_generator>=1.10
 Click>=7.1.2
 # workaround for https://git.ziirish.me/ziirish/burp-ui/-/issues/347#note_3770
-Werkzeug==2.0.2
+Werkzeug==3.0.6
 cryptography==36.0.2