iPadOS 6.1.3 (build 10B329) is an official Apple over-the-air update for the iPad mini (WiFi). The update package is 83.75 MB. This is a delta (partial) update that requires 6.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bf93931912cba82462f548664fc0be3adea8eacf.zip.