neowin[.]net/news/here-is-how-you-can-upgrade-to-windows-10-22h2-right-now/
... but probably shouldn't / won't want to bother.
If you're running the latest version with the July 2022 updates the tiny [176KB] KB5015684 is all that's required, + a restart. Links to the update in Microsoft's Update Catalog are included in the article. And for your time & [little] trouble you'll be rewarded by seeing Windows 10 22H2 in Settings -> System -> About. While I suppose there's some chance some new feature(s) *might* be enabled sooner this fall, that's really 'bout it -- you won't see anything different. FWIW I tried the update in a VM & it does work as promised -- it cost me the chore of re-compacting the VM's VHD just to be able to say that, that it does work [sigh], but oh well...