Stop linking to 6.1.22-SNAPSHOT reference docs

With this commit, we now include snapshots for main (which currently
correlates to 7.0.x), 6.2.x, and 7.0.x to 9.*.x.

Closes gh-35923

(cherry picked from commit 305a512a55)

framework-docs/antora-playbook.yml

@@ -13,7 +13,9 @@ content:
   - url: https://github.com/spring-projects/spring-framework
     # Refname matching:
     # https://docs.antora.org/antora/latest/playbook/content-refname-matching/
-    branches: ['main', '{6..9}.+({1..9}).x']
+    # branches: We include snapshots for main, 6.2.x, and 7.0.x to 9.*.x.
+    branches: ['main', '6.2.x', '{7..9}.+({0..9}).x']
+    # tags: We effectively include all releases from 6.0.9 to 9.*.*.
     tags: ['v{6..9}.+({0..9}).+({0..9})?(-{RC,M}*)', '!(v6.0.{0..8})', '!(v6.0.0-{RC,M}{0..9})']
     start_path: framework-docs
 asciidoc: