ssh: Migrate ssh-hardening to use the new collection

This patch migrates to the new devsec.hardening collection, because the role is now included in the collection instead and will only be updated there.

See: https://github.com/dev-sec/ansible-ssh-hardening#ssh-hardening-ansible-role

requirements.yml

@@ -1,3 +1,4 @@
 ---
-- src: dev-sec.ssh-hardening
-  version: 9.7.0
+collections:
+- name: devsec.hardening
+  version: 7.1.0

ssh.yml

@@ -18,9 +18,11 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 - hosts: ssh
+  collections:
+    - devsec.hardening
   roles:
     - role: ssh
-    - role: dev-sec.ssh-hardening
+    - role: devsec.hardening.ssh_hardening
       become: true
     - role: epel
     - role: fail2ban