fix: update repository key and no_subscription format to use ansible_distribution_release

Co-authored-by: Copilot <copilot@github.com>

tasks/install.yml

@@ -2,12 +2,12 @@
 - name: proxmox backup client | get GPG key
   get_url:
     url: "{{ pbs_repo_key }}"
-    dest: /etc/apt/trusted.gpg.d/proxmox-release-bookworm.gpg
+    dest: "/etc/apt/trusted.gpg.d/proxmox-release-{{ ansible_distribution_release }}.gpg"
     mode: '0644'
-  become: yes
+  become: true
 
 - name: proxmox backup client | add repository
-  become: yes
+  become: true
   apt_repository:
     repo: "{{ pbs_repo_no_subscription }}"
     filename: pbs-client.list