[BUGFIX] Start nighly test run at 3am rather than 0:03am

The test runs need to finish one after another, the master
currently overlaps with the 9.5, causing unneccessary load
on the build machines.

Resolves: #89699
Related: #89661
Releases: master
Change-Id: I20ae5cf6b756541cdc163e5e45f4e2db3962eeab
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62337
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>

Build/bamboo/src/main/java/core/NightlySpec.java

@@ -245,7 +245,7 @@ Plan createPlan() {
                 new ScheduledTrigger()
                     .name("Scheduled")
                     .description("once a day")
-                    .cronExpression("0 3 0 ? * *")
+                    .cronExpression("0 0 3 ? * *")
             )
             .variables(
                 new Variable("changeUrl", ""),