[Checks] Update documentation for checks retention (#38837)

Co-authored-by: Matt Pollard <mattpollard@users.noreply.github.com>

data/reusables/pull_requests/retention-checks-data.md

@@ -1,6 +1,6 @@
 {% ifversion fpt or ghec %}
 
-{% data variables.location.product_location %} retains check data for 400 days. After 400 days, the data is archived.
+{% data variables.location.product_location %} retains checks data for 400 days. After 400 days, the data is archived. 10 days after archival, the data is permanently deleted.
 
 {% elsif ghes %}
 
@@ -8,4 +8,4 @@ Site administrators can control the retention policy for checks data on {% data
 
 {% endif %}
 
-For archived check data, a rollup commit status appears that represents the state of all of the checks for the commit. To merge a pull request with checks that are both required and archived, you must rerun the checks.
+{% ifversion ghes < 3.10 %} For archived checks data, a rollup commit status appears that represents the state of all of the checks for the commit. {% endif %} To merge a pull request with checks that are both required and archived, you must rerun the checks.