Install: Bump Chamilo version number stability in preparation for stable release of 1.11.12

Author: ywarnier

main/install/version.php

@@ -14,9 +14,9 @@
  * Variables used from the main/install/index.php.
  */
 $new_version = '1.11.12';
-$new_version_status = 'beta';
+$new_version_status = 'stable';
 $new_version_last_id = 0;
-$new_version_stable = false;
+$new_version_stable = true;
 $new_version_major = false;
 $software_name = 'Chamilo';
 $software_url = 'https://chamilo.org/';