Use lineinfile

ansible/post-deploy.yml

@@ -64,12 +64,13 @@
       become: true
 
     - name: Set authorized keys for git user
-      authorized_key:
-        user: git
-        state: present
-        key: "{{ lookup('file', '/home/git/.ssh/id_rsa.pub') }}"
+      lineinfile:
         path: /var/lib/gitea/git/.ssh/authorized_keys
-        manage_dir: false
+        line: "{{ lookup('file', '/home/git/.ssh/id_rsa.pub') }}"
+        owner: git
+        group: git
+        state: present
+      with_file:
       become: true
 
     - name: Symlink the authorized keys configuration