Apply suggestions from code review

Author: bene2k1

tutorials/ceph-cluster/index.mdx

@@ -36,7 +36,7 @@ This tutorial guides you through deploying a three-node Ceph cluster with a RADO
     ```
     sudo apt update
     sudo apt install -y python3 chrony lvm2 podman
-    sudo systemctl enable --now chronyd
+    sudo systemctl enable chrony
     ```
 
 3. Set unique hostnames on each Ceph node:
@@ -76,8 +76,8 @@ This tutorial guides you through deploying a three-node Ceph cluster with a RADO
 
 1. Add the Ceph repository for the latest stable release (e.g., Reef or newer):
     ```
-    curl -sL https://download.ceph.com/keys/release.asc | sudo apt-key add -
-    echo "deb https://download.ceph.com/debian-reef/ noble main" | sudo tee /etc/apt/sources.list.d/ceph.list
+    wget -q -O- 'https://download.ceph.com/keys/release.asc' | sudo tee /etc/apt/trusted.gpg.d/ceph.asc
+    sudo apt-add-repository 'deb https://download.ceph.com/debian-squid/ jammy main'
     sudo apt update
     ```