Switch back the docs version

Author: bbatsov

doc/antora.yml

@@ -2,6 +2,6 @@ name: cider-nrepl
 title: CIDER nREPL
 # The version should be in the format major.minor (e.g. 0.28).
 # Don't include patch in the version (e.g. 0.28.5).
-version: "0.28"
+version: ~
 nav:
 - modules/ROOT/nav.adoc