Updates timing of triggers automated jobs

Aligns the timing better to UK time rather than the previous time zone
it was designed for.

Change-Id: I53e87f66c5b5ef8e2ebdb84b14df54c25e0dc11d
Signed-off-by: Matthew Dalzell <matthew.dalzell@arm.com>
diff --git a/tf-m-release.yaml b/tf-m-release.yaml
index cad876c..e84358f 100644
--- a/tf-m-release.yaml
+++ b/tf-m-release.yaml
@@ -13,7 +13,7 @@
     sandbox: true
     concurrent: true
     triggers:
-      - timed: 'H 0 8-14,22-28 * 0'
+      - timed: 'H 7 8-14,22-28 * 0'
     properties:
       - build-discarder:
           days-to-keep: 30