Create releasenotes page for tempest 45.0.0

Depends-On: https://review.opendev.org/c/openstack/releases/+/959919

Change-Id: I582d1fbd99053f857f04e4d9b3dce9a9e84a4f1b
Signed-off-by: Ghanshyam Maan <gmaan@ghanshyammann.com>
diff --git a/releasenotes/source/index.rst b/releasenotes/source/index.rst
index 5439ab6f..33c141d 100644
--- a/releasenotes/source/index.rst
+++ b/releasenotes/source/index.rst
@@ -6,6 +6,7 @@
    :maxdepth: 1
 
    unreleased
+   v45.0.0
    v44.0.0
    v43.0.0
    v42.0.0