playbook: actually Debian 10 doesn't support https URL

fixup of b68b3f17

playbook/roles/repository/tasks/main.yml

@@ -6,7 +6,7 @@
   - name: Force HTTP repository for old debian versions without HTTPS support
     set_fact:
       base_open_build_url: "{{ base_open_build_url_http }}"
-    when: (ansible_distribution == "Debian" and ansible_distribution_major_version|int < 10) or
+    when: (ansible_distribution == "Debian" and ansible_distribution_major_version|int < 11) or
           (ansible_distribution == "Ubuntu" and ansible_distribution_major_version|int < 18)
 
   - name: Remove {{ base_open_build_url }} key (and add later) on every upgrade, as expiration date is quite short (2 months).