[stable/2024.1] Add docs for Ceph (#1867)

This is an automated cherry-pick of #1866
/assign mnaser
diff --git a/doc/source/admin/index.rst b/doc/source/admin/index.rst
index 87d5546..2232882 100644
--- a/doc/source/admin/index.rst
+++ b/doc/source/admin/index.rst
@@ -13,7 +13,8 @@
 .. toctree::
    :maxdepth: 2
 
+   ceph
    integration
-   monitoring
    maintenance
+   monitoring
    troubleshooting