Fix indentation in releasenotes

This commit fixes indentations in releasenotes. Due to the indentations,
the html contents are rendered as block quotes which is awkward.

Change-Id: Ia9f271ead6a6e3fb90afc935771e8da4d8990c3c
diff --git a/releasenotes/notes/make-object-storage-client-as-stable-interface-d1b07c7e8f17bef6.yaml b/releasenotes/notes/make-object-storage-client-as-stable-interface-d1b07c7e8f17bef6.yaml
index 2bba952..37eeec5 100644
--- a/releasenotes/notes/make-object-storage-client-as-stable-interface-d1b07c7e8f17bef6.yaml
+++ b/releasenotes/notes/make-object-storage-client-as-stable-interface-d1b07c7e8f17bef6.yaml
@@ -6,6 +6,6 @@
     other projects can use these modules as stable libraries
     without any maintenance changes.
 
-      * account_client
-      * container_client
-      * object_client
+    * account_client
+    * container_client
+    * object_client