Microsoft has rolled out KB4517787 for Windows 10 insider Version 20H1. This Cumulative update increases Build number to18965.1005 for the Fast ring. The patch is a little bit bigger as it is designed to test the servicing pipeline with larger updates. This update contains no new features, improvements, and fixes. Microsoft is just updating the version numbers of multiple components in the OS.
You might have read Windows 10 Build 18965 [20H1] Changelog. This is a cumulative patch for this insider update.
Source – Windows Explorer Build.
You can manually download this patch from the following links –