tf-a-lts-automation.yaml: fix bug

Change-Id: I971f1966a06c80e0761c93bf65fedf091a78b44d
Signed-off-by: Arthur She <arthur.she@linaro.org>
diff --git a/tf-a-lts-automation.yaml b/tf-a-lts-automation.yaml
index 5abfff3..c1b2478 100644
--- a/tf-a-lts-automation.yaml
+++ b/tf-a-lts-automation.yaml
@@ -71,7 +71,7 @@
             fi
 
             # Create new LTS branch to related repositories
-            repos="hafnium TF-A/tf-a-tests ci/tf-a-ci-scripts"
+            repos="hafnium/hafnium TF-A/tf-a-tests ci/tf-a-ci-scripts"
             for r in ${repos};
             do
                 echo "Create branch \"${new_branch}\" from tag \"${forked_tag}\" in the \"${r}\" project"