Try focal

Author: kou

dev/tasks/tasks.yml

@@ -1012,8 +1012,8 @@ tasks:
 
 {% for r_org, r_image, r_tag in [("rhub", "ubuntu-release", "latest"),
                                  ("rocker", "r-ver", "latest"),
-                                 ("rstudio", "r-base", "4.2-noble"),
-                                 ("rstudio", "r-base", "4.1-noble")] %}
+                                 ("rstudio", "r-base", "4.2-focal"),
+                                 ("rstudio", "r-base", "4.1-focal")] %}
   test-r-{{ r_org }}-{{ r_image }}-{{ r_tag }}:
     ci: azure
     template: r/azure.linux.yml