update config for 3.13 ga

Author: ColeHiggins2

_config.yml

@@ -9,14 +9,14 @@ url: https://theforeman.org
 baseurl: "" #keep at "" for the Atom feed
 
 # latest *stable* version
-foreman_version: '3.12'
+foreman_version: '3.13'
 
 # Latest releases
 foreman_latest_releases:
+  - minmaj: '3.13'
+    patch: '0'
   - minmaj: '3.12'
     patch: '1'
-  - minmaj: '3.11'
-    patch: '5'
 
 paginate: 5
 paginate_path: "blog/page:num"