Passenger 6.1.3

Version 6.1.3 of the Passenger application server has been released. This release adds packages for Ubuntu 26.04 "resolute", and removes packages for Ubuntu 25.10 "questing" and Ubuntu 20.04 "focal". Added support for Ruby app post response hooks The optional feature of Rack 3 (`rack.response_finished`) is now supported, Closes GH-2418. Fix a crash when buffer creation fails Passenger could crash when it was unable to create a buffer file while handling a request that exceeded the in-memory buffer size. This was fixed through additional pointer validation.