Add release notes page for version 24.0.0

Tempest 24.0.0 has been released.
This commit adds a new page for 24.0.0 release notes.

Change-Id: Ia2b5f656a710db22677a7fec8c91897f42d5ae71
diff --git a/releasenotes/source/index.rst b/releasenotes/source/index.rst
index bfd8b2d..d8702f9 100644
--- a/releasenotes/source/index.rst
+++ b/releasenotes/source/index.rst
@@ -6,6 +6,7 @@
    :maxdepth: 1
 
    unreleased
+   v24.0.0
    v23.0.0
    v22.1.0
    v22.0.0
diff --git a/releasenotes/source/v24.0.0.rst b/releasenotes/source/v24.0.0.rst
new file mode 100644
index 0000000..8131975
--- /dev/null
+++ b/releasenotes/source/v24.0.0.rst
@@ -0,0 +1,6 @@
+=====================
+v24.0.0 Release Notes
+=====================
+
+.. release-notes:: 24.0.0 Release Notes
+   :version: 24.0.0