feat: Update simulation API to use new .py

Author: anth-volk

projects/policyengine-api-simulation/pyproject.toml

@@ -16,7 +16,7 @@ dependencies = [
     "pydantic-settings (>=2.7.1,<3.0.0)",
     "opentelemetry-instrumentation-fastapi (>=0.51b0,<0.52)",
     "policyengine-fastapi",
-    "policyengine>=0.6.0,<=0.6.1",
+    "policyengine>=0.6.0,<=0.7.0",
     "policyengine-uk>=2.22.8",
     "policyengine-us>=1.370.2",
     "tables>=3.10.2",