fix: service_invocation/python/http/order-processor/requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-6808933

Author: snyk-bot

service_invocation/python/http/order-processor/requirements.txt

@@ -1,3 +1,4 @@
 Flask
 dapr
-typing-extensions
+typing-extensions
+werkzeug>=3.0.3 # not directly required, pinned by Snyk to avoid a vulnerability