This repo has an action to build Iris for each commit.

This is an action provided from the Github Official.

You can use it to publish the build result to Github actions page automated.

(I only want to a latest build for Minecraft 1.17

Please read #247 (comment), we are trying to discourage use of development builds. An official build for 1.17 isn't far off, but you will need to manually build it if you wish to use the latest commit.