update urllib3 to newer version (OpenAPITools#22515)

Author: wing328

modules/openapi-generator/src/main/resources/python-fastapi/requirements.mustache

@@ -29,7 +29,7 @@ Rx==1.6.1
 starlette==0.49.1
 typing-extensions==4.13.2
 ujson==4.0.2
-urllib3==2.5.0
+urllib3==2.6.0
 uvicorn==0.13.4
 uvloop==0.21.0
 watchgod==0.7

samples/server/petstore/python-fastapi/requirements.txt

@@ -29,7 +29,7 @@ Rx==1.6.1
 starlette==0.49.1
 typing-extensions==4.13.2
 ujson==4.0.2
-urllib3==2.5.0
+urllib3==2.6.0
 uvicorn==0.13.4
 uvloop==0.21.0
 watchgod==0.7