tf-a-weekly: Small change to re-deploy job

Signed-off-by: Benjamin Copeland <ben.copeland@linaro.org>
Change-Id: I4d7ab53843dec811667e4a9b7352b90c48cc4c37
diff --git a/tf-a-weekly.yaml b/tf-a-weekly.yaml
index 95b1600..9782e62 100644
--- a/tf-a-weekly.yaml
+++ b/tf-a-weekly.yaml
@@ -64,7 +64,7 @@
         - string:
             name: SHARE_FOLDER
             default: '/srv/shared/${JOB_NAME}/${BUILD_NUMBER}'
-            description: 'Folder containing shared repositories for downstream pipeline jobs'
+            description: 'Folder containing shared repositories for downstream pipeline jobs.'
     wrappers:
       - workspace-cleanup
       - timestamps