tf-a-lts-verified-propagater.yaml: Change label status and value mapping

Verified +1 mapping to the status is "OK" not "MAY"

Signed-off-by: Arthur She <arthur.she@linaro.org>
Change-Id: I41661c0692b440e7db360a6d35eaa242cf6d2b13
diff --git a/tf-a-lts-verified-propagater.yaml b/tf-a-lts-verified-propagater.yaml
index a34501b..24c3e3d 100644
--- a/tf-a-lts-verified-propagater.yaml
+++ b/tf-a-lts-verified-propagater.yaml
@@ -32,7 +32,7 @@
         verified_value=0
         if [ "${verified_status}" == "REJECT" ]; then
             verified_value=-1
-        elif [ "${verified_status}" == "MAY" ]; then
+        elif [ "${verified_status}" == "OK" ]; then
             verified_value=1
         fi