Add default .com job archival notes

doc/user/admin_area/settings/continuous_integration.md

@@ -143,6 +143,8 @@ Once that time passes, the jobs will be archived and no longer able to be
 retried. Make it empty to never expire jobs. It has to be no less than 1 day,
 for example: <code>15 days</code>, <code>1 month</code>, <code>2 years</code>.
 
+As of June 22, 2020 the [value is set](../../gitlab_com/index.md#gitlab-cicd) to 3 months on GitLab.com. Jobs created before that date will be archived after September 22, 2020.
+
 ## Default CI configuration path
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/18073) in GitLab 12.5.

doc/user/gitlab_com/index.md

@@ -83,6 +83,7 @@ Below are the current settings regarding [GitLab CI/CD](../../ci/README.md).
 | [Max jobs in active pipelines](../../administration/instance_limits.md#number-of-jobs-in-active-pipelines) | `500` for Free tier, unlimited otherwise | Unlimited
 | [Max pipeline schedules in projects](../../administration/instance_limits.md#number-of-pipeline-schedules) | `10` for Free tier, `50` for all paid tiers | Unlimited |
 | [Max number of instance level variables](../../administration/instance_limits.md#number-of-instance-level-variables) | `25` | `25` |
+| [Scheduled Job Archival](../../user/admin_area/settings/continuous_integration.md#archive-jobs-core-only) | 3 months | Never |
 
 ## Repository size limit