tweak warning

chapter_25_CI.asciidoc

@@ -2,21 +2,13 @@
 == CI: Continuous Integration
 
 
-.Warning, Chapter Update in Progress
+.Warning, Fresh Content
 *******************************************************************************
-🚧 Warning, this chapter is still a bit rough. 🚧
+This chapter has had a big rewrite!
 
-For the 3e I decided switch away from Jenkins to something more modern.
-I've avoided the obvious choice of GitHub Actions,
-in favour of GitLab, just to avoid tying the book too much to the dominant commercial player
-(GitLab is at least open source and optionally self-hosted!)
-
-Most of the chapter is there though,
-and you'll just find a few todos or placeholders needing more write-up.
-
-I also put together a rough sketch of a CD
-(Continuous Delivery, ie automated deployments on push)
-appendix at <<appendix_CD>>.
+As always, feedback is welcome, but especially-especially
+since this stuff is all so new.
+Let me know how you get on :)
 
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