Minor fixups for asciidoc attributes in antora.yml

Move the "automatically modified" comment, update the commit message,
and regenerate antora.yml.

Fixes: 87f7f6c ("Move asciidoc attributes to antora.yml")

.github/workflows/update-versions.yml

@@ -22,7 +22,7 @@ jobs:
           git config user.name 'CoreOS Bot'
           git config user.email [email protected]
           if ! git diff --quiet --exit-code; then
-              git commit -am "site: update software versions ✨" \
+              git commit -am "antora: update software versions ✨" \
                   -m "Triggered by update-versions GitHub Action."
           fi
       - name: Open pull request

antora.yml

@@ -1,20 +1,11 @@
-# Name will be mostly visible in the URL. Treat it as an identifier.
-# Tip: If you want to use the local preview scripts that come with this repository, please change this value in the site.yml file as well. (under site/start_page)
-name: fedora-coreos  # <---- PLEASE MODIFY
+# Automatically modified by update-versions.py; comments will not be preserved
 
-# Title will be visible on the page.
-title: Fedora CoreOS # <---- PLEASE MODIFY
-
-# If you don't plan to have multiple versions of the docs (for example, to document multiple versions of some software), you can ignore this field. Otherwise, change "master" to a specific version.
+name: fedora-coreos
+title: Fedora CoreOS
 version: master
-
-# We encourage you to name the index page as "index.adoc". If you absolutely have to use a different name, please reflect it here. You can ignore this field otherwise.
 start_page: ROOT:index.adoc
-
-# This lists all the menu definitions of your component.
 nav:
 - modules/ROOT/nav.adoc
-
 asciidoc:
   attributes:
     stable-version: 35.20220227.3.0

site.yml

@@ -1,5 +1,3 @@
-# Automatically modified by update-versions.py; comments will not be preserved
-
 site:
   title: Local Preview
   start_page: fedora-coreos::index.adoc