tf-a-lts-automation: fix email recipient error

Change-Id: I97948b55ff070b81aefe9e644eec288bddadc0d3
Signed-off-by: Arthur She <arthur.she@linaro.org>
diff --git a/tf-a-lts-automation.yaml b/tf-a-lts-automation.yaml
index 9256215..ffb3256 100644
--- a/tf-a-lts-automation.yaml
+++ b/tf-a-lts-automation.yaml
@@ -15,7 +15,7 @@
         - string:
             name: EMAIL_RECIPIENT
             default: |
-              bipin.ravi@arm.com, vwadekar@nvidia.com, yann.gautier@st.com, palmer@google.com, govindraj.raja@arm.com arthur.she@linaro.org
+              bipin.ravi@arm.com, vwadekar@nvidia.com, yann.gautier@st.com, palmer@google.com, govindraj.raja@arm.com, arthur.she@linaro.org
             description: |
               The notification recipients
     wrappers: