Force update tf-a-gerrit-tforg-l2.yaml

Change-Id: Idc591924f87b569387a4c9ce8cb78308056af09a
Signed-off-by: Arthur She <arthur.she@linaro.org>
diff --git a/tf-a-gerrit-tforg-l2.yaml b/tf-a-gerrit-tforg-l2.yaml
index 87c9d04..a1a4268 100644
--- a/tf-a-gerrit-tforg-l2.yaml
+++ b/tf-a-gerrit-tforg-l2.yaml
@@ -13,7 +13,7 @@
         enabled: true
         max-total: 5
     - build-discarder:
-        days-to-keep: 14
+        days-to-keep: 15
     parameters:
         - string:
             name: GERRIT_PROJECT