op-build v2.0.3 release notes

Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
(cherry picked from commit 0594c7baf191f1e7f05912deaef5643f8f84551b)
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
diff --git a/doc/release-notes/index.rst b/doc/release-notes/index.rst
index 3a460cd..e4c0f24 100644
--- a/doc/release-notes/index.rst
+++ b/doc/release-notes/index.rst
@@ -17,3 +17,4 @@
    v2.0
    v2.0.1
    v2.0.2
+   v2.0.3